a. Does putting the yeast on salt cause the beneficial mutation? Why or why not?
When the logarithmic growth of cells is interrupted by exposure to a 0.5 to 2 Molar salt solution the aueous solution consisting of KCl, NH4Cl, NaCl, MgCl2 are basically mutagenic in yeast .
Stationary phase cells are not mutated by the treatment.
b. If you screened your mutagenized yeast cell population on caffeine (another substance that normally kills them), could you find caffeine tolerant ones? (assume there is the potential for genetic resistance to caffeine).
For normal tolerance to caffiene the sty1 and pap 1 pathways are not necessary, but generally only sty1 is activated by mutation hence making yeast sensitive for caffiene.
force acts on an object, causing it to move parallel to the force. The graph
below shows this force as a function of the position of the object. How much work does the
force do as the object moves from 0 to 15 m?
hope Force
W
(N) 20
500
۔
ash
10
No
so
asto
F
Pesibon (m)
100 t
5
10
15
c. 251
B. 125 )
A 50J
dois
D) 100
Answer:
d
Explanation:
The work done by the force is 150 J.
(d) is correct option.
Explanation:
Given that,
The object moves from 0 to 15 m.
Displacement = 15 m
Suppose the graph shows this force as a function of the position of the object
We need to calculate the work done
According to graph,
W = area under the graph from 0 to 15
Where, h = height
b = base
Put the value into the formula
Hence, The work done by the force is 150 J.
DNA - TAC CAT GGA ATT ACT
RNA - ?
Amino Acids - ?
PLZ HELP
Answer:
DNA: TAC CAT GGA ATT ACT
RNA: AUG GUA CCU UAA UGA
Amino acids: met- val-leu-stop-stop
Explanation:
DNA: T =A to RNA
DNA: A = U to RNA.
Use the genetic code to find the amino acids.
starting from left-up-right, by three codons. use the image below.
NEED HELP!!!!!!!
Distinguish the functions professional organizations may play in the lives of those with horticultural careers.
Answer:
Knowledge and Skill
Explanation:
Giving people opportunities to enhances their knowledge about horticulture would spread accurate facts and advice about any aspect of the career. Economically, it would provide people with the chance to obtain jobs, sell well-cared-for flora, and create a food source if taken care of properly.
Ty
N
Тір
- According to Figure 13-3, which code specifies the same amino acid as UAU?
Codons Found in Messenger RNA
Second Base
U с A
Phe Sor Тут Cysu
Phe Ser
Cyc
U
Lou Ser Stop
Stop A
Lou Sor Stop
G
Lou Pro His Arg U
Lou Pro His Arg
С
Lou Pro Gin
Arg
Lou
Pro Gin Ang
Thi Asn so U
А
The
Asn Bor
Bo Thr Lyo Arg A
Met Thr
Lyo
Arg
Val Ala Asp GyU
Ve Ala Aap GM С
G
Vol Als Glu ау A
Als
G
First Base
Third Base
le
Val
GY
Figure 13-3
OUAC
UAA
OUGC
UGU
Answer:
what do you need help on what you need help
Mutation comes from the Latin word mutare,
meaning "to change." How can mutations change an organism's traits?
Answer: Mutation can affect an organism by resulting to a change in the number and structure of chromosomes (chromosomal mutation). A typical example of this type of mutation is Down's syndrome where the individual contains 47 instead of 46 chromosomes.
Mutation can also result to a change in the nucleotide sequence of the DNA molecule in a particular region of a chromosome(Gene mutation) an example of genetic mutation is sickle cell anemia
Explanation:
Tumor suppressor proteins can assist in slowing down the cell cycle under appropriate conditions.
a. True
b. False
Answer:
True
Explanation:
Tumour-suppressor proteins can be regarded protein that it's action
alleviate the potential for cancer as well as tumor formation, through modulation of cell growth by negative regulation of the cell cycle or through promotion of apoptosis. Mutation dysregulation of tumour-suppressor proteins could result to unregulated growth of cell as well as tumour development. In humans, tumor suppressor which is known as p53 is been encoded by TP53 gene. Some of the mutations that is seen in TP53 gene has mutant form of p53 as result, and there won't be room for longer function in slowing down cell cycle, and this will result in the cell becoming cancerous. Though some mutant forms of p53 has the ability to have increased resistance of cell to anticancer treatments. This is known as gain-of-function mutation.
Therefore, Tumor suppressor proteins can assist in slowing down the cell cycle under appropriate conditions
During a muscle contraction, the muscle cell membrane becomes temporarily permeable to
a. acetylcholine.
b. sodium
ОООО
с. АТР.
d. calcium.
During muscle contraction, the muscle cell membrane becomes temporarily permeable to sodium (Option b is correct).
Muscle cells are excitable, which means that these cells change from a resting state to an excited state in response to stimuli.At resting (non-signaling) state, Na+ ions are found at a higher concentration outside of the muscle cell than inside the cell, whereas potassium (K2+) ions are found at a higher concentration inside the cell than out the cell.When a nerve transmits an excitable signal that a muscle cell, Na+ flows into the muscle cell, and simultaneously potassium (K2+) ions out of the cell.The influx of Na+ ions is caused by the opening of voltage-gated sodium (Nav) channels found in the membrane (sarcolemma) of muscle cells.In conclusion, during muscle contraction, the muscle cell membrane becomes permeable to sodium ions (Option b is correct).
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In drosophila the anterior-posterior axis is established bya. The distribution of the RNA-binding transcription factor called bicoid and the protein nanos localized in the anterior and posterior poles of the embryo, respectivelyb. The distribution of a gene that codes for an RNA-binding protein called nanos localized in the anterior pole of the embryo and a transcription factor called bicoid localized in the posterior pole of the embryo
Complete question:
In Drosophila the anterior-posterior axis is established by
a. The distribution of the RNA-binding transcription factor called bicoid and the protein nanos localized in the anterior and posterior poles of the embryo, respectively
b. The distribution of a gene that codes for an RNA-binding protein called nanos localized in the anterior pole of the embryo and a transcription factor called bicoid localized in the posterior pole of the embryo
c. The distribution of a gene that codes for an RNA-binding protein called nanos localized in the posterior pole of the embryo and a transcription factor called bicoid localized in the anteror pole of the embryo
d. The distribution of the RNA-binding transcription factor called bicoid and the protein nanos localized in the posterior and anterior poles of the embryo, respectively
Answer:
c. The distribution of a gene that codes for an RNA-binding protein called nanos localized in the posterior pole of the embryo and a transcription factor called bicoid localized in the anterior pole of the embryo
Explanation:
When the Drosophila zygote develops, it goes through different stages until it gets to the blastula stage. At this point, there are pole cells that determine the axis of the organism -the anteroposterior and the dorsoventral axis-.
A two hours old embryo has already determined its two axes. A ten hours old embryo has already determined its body segments. And from there, each of them develops a structure that turns to be their identity.
Different genes determine the polarity of the egg.
Dorsoventral genes place in the superior and inferior parts of the egg and determine the development of dorsal and ventral tissues.
The same happens with anteroposterior genes.
The BICOID genes place in the anterior part of the egg and activate the hunchback genes that determine the development of the head and the thorax. The Bicoid mRNA distributes in the anterior region of the egg.The NANOS gene reprimes the hunchback genes, which promoted the development of the posterior structures of the body. The Nano mRNA places in the posterior region of the egg, and Nano proteins distribute in this area.The polarity genes of the egg are genes of maternal effects.
While the bicoid and nano genes are expressed in the ovary, the hunchback gene is expressed in the embryo. This last one is activated or inhibited by the foreign ones.
Bicoid and nano genes gradient regulate the expression of the gap, pair-rule, and segment polarity genes.
HELP!!!!!!!!!!!
Which of the following is the most likely professional classification of a scientist whose studies focused on the commercial production of pecans?
forest manager
botanist
pomologist
arborist
Answer:
Pomologist
Explanation:
A pomologist is a scientist responsible for ensuring the healthy growth and breeding of fruits and nuts, and the trees and bushes on which they grow. Pomology is the planting, harvesting, storing, processing, and marketing of fruit and nut crops.
A.O. is an 89-year-old woman with a long history of systolic heart failure secondary to a large left ventricular infarct when she was in her 70s. She had poor activity tolerance and required assistance with activities of daily living. Even minimal activity was associated with moderately severe dyspnea and exertional chest pain, which was relieved by rest. A.O. also exhibited marked pedal edema bilaterally. She is being treated with digitalis, furosemide (Lasix), KCl, and sublingual nitroglycerin.
What compensatory mechanisms are likely to be operative in A.O. to enhance cardiac output?
A. Prolonged stretch on the myocardium results in myocardial atrophy.
B. Baroreceptors detect low blood pressure and cardiac output and activate the parasympathetic system resulting in increased heart rate.
C. Renin-angiotensin system activation causes decreased glomerular filtration rate and fluid retention, which results in increased preload.
D. Baroreceptors detect low blood pressure and cardiac output and activate the sympathetic system resulting in decreased heart rate.
Answer:
The correct answer is ''C. Renin-angiotensin system activation causes decreased glomerular filtration rate and fluid retention, which results in increased preload.''
Explanation:
In states of low cardiac output, the renin-angiotensin-aldosterone pathway is activated as a compensatory mechanism, whose objective is to fundamentally modify the peripheral circulation, which operates in conjunction with the activation of the medullary neuro-adrenal system, to maintain blood pressure. These two mechanisms, which are totally different, are closely linked; thus, stimulation of beta-1 adrenoreceptors in the juxtaglomerular apparatus, as a consequence of a high adrenergic output, causes renin output in heart failure. On the other hand, the activation of baroreceptors in the renal vascular bed caused by a reduction in renal blood flow, is also responsible for the release of renin, it occurs in patients with severe heart failure managed with diuretics and salt restriction.
HEY I NEED SOMEONE TO HELP ME WITH THESE NOTES PLZ
• How does precipitation affect the topology of the earth?
Answer: Global Climate Change. comes from precipitation. Too little precipitation can result in dry soil, shallow streams, and shortages of municipal water supplies. However, too much precipitation can also have a negative impact on human activities, business and industry, agriculture, and the environment. As moist air is forced up the windward slope it expands and cools, eventually causing water droplets to condense when the air is saturated. These droplets form clouds and grow to produce rain or snow that typically falls out on the windward side of the range. ... As air approaches the topography, it slows down.
Explanation:
Precipitation affects the topology of the earth positively and negatively ( excess precipitation leads to soil erosion while moderate precipitation repairs broken/dry soil surfaces making it fertile )
Precipitation has a positive and negative effect on the topology of the earth because excessive precipitation like heavy rainfall causes flooding and the heavy movement of flood water, washes away the surface soil ( erosion ) which affects the topology of the earth negatively. while
Moderate precipitation repairs dry and broken soil surfaces making the topology of the earth fertile, supporting the growth of plants and inhabitation of animals .
Hence we can conclude that precipitation affects the topology of the earth positively and negatively.
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Question 7 0410
The process of
releasing energy
is when two stoms combine to form a larger atom,
Answer here
Answer:
Nuclear fusion
Explanation:
Nuclear fusion is a process whereby the nuclei of two smaller atoms combine to form a much larger atom, accompanied with the release of energy. This is opposed to nuclear fission where a larger atom splits into simpler and smaller atoms.
According to this question, the process of releasing energy when two stoms combine to form a larger atom is called NUCLEAR FUSION. A very common example of nuclear fusion is the combination of hydrogen atoms in the sun to produce Helium atom, with the release of heat energy.
Are also affected by the process. We can get diseases by eating seafood that has been poisoned
(Q001) Use the fossil descriptions here and the material on p. 388 of your lab manual to answer the questions for this exercise. Note: When completing this exercise, it may be useful to refer back to Labs 10-12 for information about living primates. Mystery fossil genus A has been dated to the late Pliocene and early Pleistocene. Its canines were sexually dimorphic, and it had bilophodont molars. Its postcranial traits indicate that it was a terrestrial quadruped, and its overall body size was over 55 lb (25 kg). Mystery fossil genus B has been dated to the early Miocene. It is estimated that adults weighed around 2 lb (1 kg), with some sexual dimorphism possible in body weight and canine size. Which of these mystery fossils is a fossil Old World monkey
Answer:
Mistery fossil genus A belongs to the monkeys of the old world.
Explanation:
Old-World Monkeys:
Most of them are big and robustSome of them have hairless bulky structures in the posterior region of their bodies named ischiatic callosities. Their noses are pointing down and their holes are close to each other. They have semi-thumb or no thumb at all. They have plane nails.They have big brains and skulls. They spend most of their time on the ground, resting on rocks or similar places too height. However, they can also be found in trees.New-World Monkeys:
They are small-sized animalsTheir brain and skulls are small.Their nose holes are separated from each other and pointing at each side. Their thumb is developed because they have arboreal habits, so they need the thumbs to hold to the branches and move. They spend most of their time on trees. They hardly move on the floor. They also have sharp nails. They have long tails and no ischiatic callositiesMystery fossil genus A
has been dated to the late Pliocene and early Pleistocene.
Its canines were sexually dimorphic, and it had bilophodont molars.
Its postcranial traits indicate that it was a terrestrial quadruped,
and its overall body size was over 55 lb (25 kg).
Mystery fossil genus B
has been dated to the early Miocene.
It is estimated that adults weighed around 2 lb (1 kg),
with some sexual dimorphism possible in body weight and canine size.
Mistery fossil genus A belongs to the monkeys of the old world.
1 ÷ (-½). please anawer
Answer:
(-2)
Hope it helps!!!
Explanation:
Answer:
[tex] - 2[/tex]
Explanation:
[tex]1 \div ( - \frac{1}{2} ) \\ 1 \times - \frac{2}{1} \\ \frac{ - 2}{1} = - 2[/tex]
Hope this helps you.
Can I have the brainliest please?
Which class of Lever is being described if you are standing on tiptoes and if: The Fulcrum is at the metatarsal and phalanges, which is at one end of this lever on the anterior side of the body. The Load is your body weight which is in the middle of this lever. The Effort is exerted by the gastrocnemius and soleus muscles at the calcaneal (Achilles') tendon on the other side of this lever on the posterior side of the body.
Answer:
Second class lever
Explanation:
A second class lever is when the resistance ( load/weight ) is placed in between the axis ( Fulcrum which is formed by the metatarsal and Phalanges ) and the force ( Achilles tendon ) that is applied to the lever. hence the class of lever being described is a second class lever
There are three classes of lever ( 1st class, 2nd class and third class ) but The most common lever found in Humans are the 3rd class levers. but standing on tiptoes by an individual is a perfect example of a 2nd class lever found in a Human.
The Load being the body weight being and in the middle of this lever is
referred to a the second class lever.
The second class lever has the load in between the effort (force) and the
fulcrum. A common example is the wheelbarrow which has the load in the
middle.
In this scenario, the load which is the body is between the
effort(gastrocnemius and soleus muscles) and the fulcrum is the phalanges
which is a characteristic of a second class lever.
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You are a reporter working in 2001 who's just been assigned a story on how ciprofloxacin may save the lives of Senate staff exposed to anthrax. Complete a short paragraph that links how DNADNA is replicated to defense against this act of bioterrorism.
Match the terms in the left column to the appropriate blanks in the sentences on the right. Terms can be used once, more than once, or not at all.
separate tensed
ligase unwinding
relaxed enhances
inhibits uniting
gyrase join
helicase
Bacterial DNA is a double-stranded helix that has to ___________ its strands during replication. The _______ of DNA strands at the replication fork creates twists farther down the helix that need to be ______ by DNA _______. Ciprofloxacin ______ this enzyme to block DNA synthesis and stop the deadly bacteria from growing.
Answer:
Bacterial DNA is a double-stranded helix that has to separate its strands during replication. The unwinding of DNA strands at the replication fork creates twists farther down the helix that need to be relaxed by DNA gyrase. Ciprofloxacin inhibits this enzyme to block DNA synthesis and stop the deadly bacteria from growing.
Explanation:
DNA which stands for deoxyribonucleic acid is the molecules that stores genetic information in most living organisms. For successive reproduction to take place as well as growth to occurs in organisms, the genetic information stored in the DNA must be copied into new cells. This is achieved through the process of DNA replication.
DNA is a double-stranded molecule that is helical in shape. For replication to occur, the double strands has to be separated so that the information stored within can be accessed and then copied. DNA helicases are enzymes which are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied. The unwinding of DNA strands at the replication fork creates twists farther down the helix that need to be relaxed otherwise, the DNA strands will break. The enzyme responsible for relaxation these twists is known as DNA gyrase. Thus, any drug like Ciprofloxacin than inhibits DNA gyrase will block the DNA replication process in bacteria thereby stopping the growth of the bacteria.
Bacterial DNA is a double-stranded helix that has to separate its strands
during replication. The unwinding of DNA strands at the replication fork
creates twists farther down the helix that need to be relaxed by DNA gyrase.
Ciprofloxacin inhibits this enzyme to block DNA synthesis and stop the
deadly bacteria from growing.
The antibiotic referred to as Ciprofloxacin acts on the DNA of the bacteria
and it does this by inhibiting the enzyme that is required for DNA
synthesis. This stops replication and the anthrax bacteria from growing and
forming new organisms.
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what is the greenhouse event primarily caused by
Explanation:
Greenhouse effect, a warming of Earth's surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapour , carbon dioxide, methane, and certain other gases in the air. Of those gases, known as greenhouse gases, water vapour has the largest effect.
Site A is pavement. Site B is bare soil. Site C is a forest, and they are all at the same slope. The percentage of rainwater that becomes runoff is greatest at Site
Site A is pavement. Site B is bare soil. Site C is a forest, and they are all at the same slope. The percentage of rainwater that becomes runoff is greatest at Site B. This is further explained below.
What is bare soil.?Generally, bare soil is simply defined as any soil or sand that is not blanketed by a layer of anything else is considered bare soil.
In conclusion, Site B is bare soil and also has the highest propensity for erosion
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100%
Question 15 (2 points)
Which energy pyramid accurately represents the amount of energy at each level of
this food web?
Owls
Skunks
Mice
Grasshoppers
Grass
Answer:
it's owls
Explanation:
Energy pyramid accurately represents the amount of energy at each level of this food web Owls.
What is Energy pyramid?
The energy present within the trophic layers of an ecosystem is called an energy pyramid, sometimes referred to as a trophic or ecological pyramid.
The producers are located in the base of the pyramid, which is also its greatest level. The amount of energy diminishes and the levels get smaller as you progress up the pyramid, via the trophic levels to primary, secondary, and tertiary consumers.
Even though it cannot be produced or destroyed, energy is emitted as heat at each level. Only 10% of energy is essentially transferred from one level to the next.
Therefore, Energy pyramid accurately represents the amount of energy at each level of this food web Owls.
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Coffee growers can form coops to eliminate the middlemen and get better pricing for their crop. When these coops receive "social certification from a reputable agency, this
indicates to the consumer what? Choose the best answer.
O a. That migrating songbirds are better served by the farmer's coffee plantation
ob. That coffee beans have been grown under organic conditions.
Oc. That coffee quality is the best possible.
O d. That social equity has been improved for these farmers.
The correct answer is C. That coffee quality is the best possible.
Explanation
A cooperative is a term that refers to a society made up of several individuals who group for the common benefit of its members. These associations are organized democratically and are administered according to the agreement established by their partners. For example, in this case, the coffee producers formed a cooperative to sell their products directly to consumers and eliminate intermediaries. In addition, they were accredited with a social certification by an accredited agency, which supports their products by indicating to consumers that their coffee is of the best quality. Therefore, the correct answer is C. That coffee quality is the best possible.
According to Darwin's theory of natural selection, the individuals that tend to survive are those that have...
Answer: adaptated to the environment
Explanation: Dawin's theory of adaptation explains that the individuals that survive adapt to the environment
Give the element symbol of the element found in period 4, group 2.
Which of the following stars correctly shows the relationship between force from fusion and force of gravity in a Main Sequence star?
Answer:
E
Explanation:
E
PLSSS HELP 30 POINTS FOR BRAINLIEST!!!!!
Answer:
Things made up of cells and things that are not made up of cells
Explanation:
Cells are the basic units of living things. Living things include plants, animals, humans, etc. So group 1 are things made up of cells and group 2 are things not made up of cells.
During DNA replication, which of the following components is not required?
Answer:
im not sure, but i think its single-stranded
Explanation:
The study of a gene is called genetics.
The question is incomplete kindly provide it with the option for a better understanding of the topic.
The duplication or making of new DNA from the older DNA is called replication.
The process of replication required various enzymes and another nucleotide to make a new DNA.
In my opinion, the thing which is not required to the process of replication is RNA polymerase as it is required to duplicate the RNA not DNA.
Hence, the correct answer is RNA polymerase.
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In cats, coat color is an X-linked trait with incomplete dominance. Yellow coat is caused by the allele XT and black coat by the allele Xt. A tortoise cost is caused by the heterozygous condition. What is the correct way to represent the genotype of a male cat with a black coat
Answer:
The genotype of a black male is XtY
Explanation:
Available data:
coat color is an X-linked trait with incomplete dominance.Yellow coat is caused by the allele XTBlack coat by the allele Xt.Tortoise coat is caused by the heterozygous conditionSo,
females genotypes females phenotype
XTXT → Yellow coat XtXt → Black coat XTXt → Tortoise coatmales genotype males phenotype
XTY → Yellow coat XtY → Black coatMales only carry one X chromosome, so they can only be either black - XtY- or yellow -XTY-.
Females are the only ones that can express the tortoise coat.
The correct way to represent the genotype of a male cat with a black coat - XtY
We know that,
In cats, coat color is an X-linked trait - it means it is influenced by the X allele onlyIn cats, coat color is shows incomplete dominance - it means if corresponding alleles present together they will show an intermediate coat color.the allele XT - Yellow coatthe allele Xt - black coatXTXt (heterozygous) - tortoise coat (incomplete dominance)In X linked traits heterozygous conditions are not possible in males as they have only one X allele and the other is Y allele.So,
Female cats genotype would be:
XTXT - female cat with yellow coatXTXt - female cat with a black coatXtXt - female cat with tortoise coatMale cats genotype:
1. XtY - black coat male cat
2. XTY - yellow coat male cat.
Thus, The correct way to represent the genotype of a male cat with a black coat - XtY
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B. Proteins complexed with DNA to form nucleosomes I. Used in chain terminator procedure to stop chain elongation H. Separation of DNA fragments based on polyanionic nature F. Substrates for translation J. A DNA gel for sequencing shows the base sequence of GATCGGA reading from bottom to top. The template sequence can be determined using this information. A. 5' - CTAGCCT B. Histones C. dNTPs D. DNA polymerase E. Restriction Mapping F. aminoacylated tRNAs G. mRNA H. Gel electrophoresis I. ddNTPs J. 5' - TCCGATC
Answer:
B. Proteins complexed with DNA to form nucleosomes- Histones
I. Used in chain terminator procedure to stop chain elongation- ddNTPs
H. Separation of DNA fragments based on polyanionic nature- Gel electrophoresis
F. Substrates for translation- mRNA
J. A DNA gel for sequencing shows the base sequence of GATCGGA reading from bottom to top. The template sequence can be determined using this information 5' - TCCGATC
Explanation:
1. The DNA in the chromatin is packaged and ordered into structural units known as nucleosomes by theirformation of complexes with proteins called Histones. Histones are small basic proteins rich in the amino acids arginine and lysine.
2. In the chain termination procedure of DNA sequencing, chain elongation is terminated at several points whenever the dideoxynucleotides, ddNTPs are added to the growing sequence of the newly synthesized DNA strand. Because the ddNTPs lack an OH group and 3' position, new nucleotides cannot be added.
3. Gel electrophoresis is a separation technique used to separate DNA fragments based on ability to migrate an electric field. The DNA molecules are negatively-charged (polyanionic) and are separated based on their size with smaller molecules migrating fastest than bigger ones.
4. The messenger RNA, is synthesized from the part of the DNA coding for a functional protein. They serve as the template from which the ribosomes read to make proteins. Thus, they serve as the substrates for translation.
5. The reading of the base sequence from an autoradiogram (DNA gel for sequencing) is from top to bottom in the 5' to 3' direction. Since the template is complementary to it, it will read in the 3' to 5' direction CTAGCCT or TCCGATC in the 5' to 3' direction.
PLs help me bruv. Im trying to get dis right
Answer:
A i believe
Explanation:
Answer: A.
Explanation: Since the two sisters have had token DNA from the father and then DNA from the mother.