Answer: D-amino acids are less likely to be recognized by proteolytic enzymes thereby they are not degradated.
Explanation:
Peptides are a type of polymers formed by joining several amino acids by means of peptide bonds. They are responsible for a large number of important cellular functions for the organism. Amino acids are thus the monomers that make up peptides and consist of an amino group (-NH2) at one end of the molecule and a carboxyl group (-COOH) at the other end.
Antibiotics are chemical substances produced by a living being (although they can also be synthetic derivatives made in laboratories), which kill or prevent the growth of certain kinds of sensitive microorganisms and are generally drugs used in the treatment of bacterial infections.
All amino acids, except glycine, are stereoisomers which means that there are nonoverlapping mirror images of their structure. These are labeled L (left-handed) and D (right-handed) to distinguish mirror images. A mirror image, for example, compares a right foot with a left foot. They are similar, but not exactly the same, they are like mirror images of each other. However, we could not, for example, put a right shoe on a left foot and vice versa. The same analogy applies to stereoisomers, they are similar but not superimposable, which means that not all compounds will act in the same way in an L or D molecule. For some reason, the amino acids that make up the proteins in human bodies are all L-amino acids.
To distinguish an L-amino acid from a D-amino acid, we must look at the α-carbon, which has four substituents forming a tetrahedron. then we must identify the hydrogen bonded directly to this carbon. In this way they are numbered and following the numbering order, they are classified as L or D.
Bacteria that secrete D amino acids kill other bacteria in the environment that might compete with them for resources, because they have antibiotic properties. These D amino acids are not usually recognized by proteolytic enzymes in organisms that degrade peptides or proteins. So the amino acid remains in the environment fulfilling its function, which is an antibiotic function to fight against other bacteria. Peptide toxins also fulfill this function, however, if they are destroyed by proteases.
Quade is studying for an exam, which will cover neurons and action potentials. He has drawn a diagram that shows the segments of an axon, and he has noted that every time a segment fires, the _____ flood in from the outside of the cell, while the prior segment returns to its resting potential. Please choose the correct answer from the following choices, and then select the submit answer button.
Answer: positive sodium ions
Explanation:
This relates to the Action Potential which is what a nerve cell goes through when it needs to send information down the nerve cell to another cell and so on till it gets to the destination of the message.
The information is transmitted when the segments of the axon fire and when they do, positive sodium ions come in from outside the cell to the inside thereby making the inside positive. The previous segment would return to a resting potential when potassium ions which are negative, rush into the cell.
In the lab activity, you will use a chemical called a pH indicator that changes color as the pH of a
solution changes. If you added a pH indicator to two different solutions and they both turned the
same color, what would this tell you about the pH of each solution?
ph indicator is used to find the acidic or basic nature of a mixture.
there is a range of colours from red to blue
red colour indicates that solution is acidic and blue colour indicates that solution is basic
if two solutions have same colour that means they also have same ph value
Which process involves TWO DNA divisions?
A. Mitosis
B. Meiosis
Answer:
b) meiosis
Explanation:
Answer:
B. Meiosis
Explanation:
Meiosis involves two DNA divisions.
What is the function of protein channels in the cell membrane?
O to stabilize the membrane
it forms the main structure of the membrane
to transport substances that cannot pass through the lipid bilayer
span the entire membrane and act as recognition for the cell
Answer:
They transport substances that cannot pass through the lipid bilayer
Explanation:
Answer:
They transport substances that cannot pass through the lipid bilayer
Explanation:
How does the skin regulate body temperature?
Group of answer choices
by increasing sweat production
by producing vitamin D
by retaining water
by regulating fat content in the epidermis
How does the skin regulate body temperature?
[tex]\circ \: \: { \underline{ \boxed{ \sf{ \color{green}{Answer.}}}}}∘[/tex]
A. by increasing sweat production. ✔
Explanation:-
The sweat glands present in the skin helps to cool the skin as it produces sweat.Sweat glands keeps the body temperature at approximately 37° C by releasing sweat in a hot environment or during physical exertion.[tex]\bold{ \green{ \star{ \orange{Mystique35}}}}⋆[/tex]
NO LINKS PLEASE
Why is the tortoise breeding program on Santa Cruz Island important?
O A. The tortoise population has increased.
O B. No one knows how long a tortoise's lifespan is.
O C. No one knows how two tortoise species became extinct.
O D. The tortoise population has decreased.
Answer:
The answer to the question is option D
48. How do matter and energy differ within a
community? Use the words recycle, trophic level,
and flow in your answer. (2.4-2.6)
Answer:
47.. in this case , the longer the food chain , the less energy is available for the rest of the members of the food chain. this indicates that a food chain with 15 trophic levels contain an energy that is insufficient to sustain all its members
48...Matter is cycled through the ecosystem in the biogeochemical cycles. ... However, energy is not recycled, but it flows into the ecosystem through the feeding relationships between the organisms in different trophic levels.
49.. (a) ...Urban development can magnify the risk of environmental hazards such as flash flooding. Pollution and physical barriers to root growth promote loss of urban tree cover. Animal populations are inhibited by toxic substances, vehicles, and the loss of habitat and food sources.
Explanation:
❣️(◍Jess bregoli◍)❣️#keep learning!!
Identify what holds DNA, the hereditary information of a cell?
(Its not the nucleus)
PLEASE HELP!
Answer:
Could be chromatin or maybe chromosomes
Which process produces genetically different cells?
A. Mitosis
B. Meiosis
Answer:
B. Meiosis
Explanation:
The meiosis produces genetically different cells.
GIVING BRAINLIEST! Please I am begging you to help, this is due in a little and these are the only two I am stuck on.
Answer:
9) C
13) D
Explanation:
Indicate whether the statement is true or false.
This is Ag work please answer correctly
____ 1. Plants are used directly and indirectly to meet human needs
____ 2. A steer is a female cow that has given birth
____ 3. You have to live on a farm to be an FFA member
____ 4. We believe are the first two words of the FFA creed
____ 5. Thank you notes are required to get a job
____ 6. Only female turkeys gobble
____ 7. A first year FFA member is called a Greenman
____ 8. To be in FFA you have to be in an Agriculture class
____ 9. It is okay to let a non FFA member wear your FFA jacket
____ 10. You have to be in FFA to have an animal project
____ 11. It is okay to leave blanks on a job application
____ 12. A male turkey is called a Tom
____ 13. While in FFA official dress it is acceptable for makes to wear khaki pants
____ 14. A cow is a ruminant animal
____ 15. Cows have only one stomach compartment
____ 16. Turkeys grow to full maturity in about 4 to 5 months
____ 17. The FFA is only in the state of Texas
____ 18. The FFA emblem plow stands for labor and tillage of the soil
____ 19. There are 3 paragraphs in the FFA creed
____ 20. A turkey under sixteen weeks of age is called a roaster
____ 21. Wild turkeys are white in color
____ 22. Freeze branding is the only way to identify cattle
____ 23. A job application is one of the first barriers that you encounter before you are employed
____ 24. The gestation period of cattle is only 3 months
____ 25. Domesticated turkeys cannot fly
____ 26. A T-bone steak is considered a by- product
____ 27. The official colors of the National FFA are blue and gold
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 28. Which act established vocational agriculture courses in 1917?
____ 29. What did FFA stand for before it was changed?
____ 30. The official colors of the FFA are
____ 31. How should the FFA jacket be worn?
____ 32. List the parts of the FFA emblem
____ 33. Plants impact what environmental factors?
____ 34. When measuring a horse 1 hand= _____ inches
____ 35. Who wrote the FFA creed?
____ 36. What provides the foundation of the FFA emblem?
____ 37. The FFA emblem has how many symbols?
____ 38. The highest FFA degree members can earn is…
____ 39. The first line of the FFA motto is
____ 40. List the official Dress for females
____ 41. What are the last few words of the first paragraph of the FFA creed
____ 42. In ___________ the FFA opened membership to girls
____ 43. ______ believe in less dependence on ________ and more power in bargaining
____ 44. The Symbol on the FFA Emblem that signifies Labor and tillage of the soil is
____ 45. What does polled mean?
____ 46. breeds of cattle are known for milk production
____ 47. What do you call a neutered male cow?
____ 48. What do you call a male sheep or goat that has been castrated when its young?
____49. Swine breed most used for pets
____ 50. The most popular goat breed used for FFA projects
Answer:
1True
Explanation:
Because plants and animals are in various relation. example Food air and e.c.t.
Biologists expect that all cells come from other cells because of the
Hooke
cell theory
endosymbiosis theory
osmosis
Answer:
Hi, there the answer is cell theory
Explanation:
What makes Protists different from the Bacteria kingdoms?
A. They are easier to find.
B. Their cells have a nucleus.
C. They are bigger.
Answer:
B. Their cells have a nucleus.
Explanation:
Protists are eukaryotes, which means their cells have a nucleus and other membrane-bound organelles. Most, but not all, protists are single-celled.
Answer:
The answer is B their cells have a nucleus
Explanation:
I took this question on an assignment got it correct!
Which is the site of the most ATP production during cellular respiration?
nucleus
mitochondrion
cytoplasm
chloroplast
Answer:
mitochondrion
Explanation:
the mitochondrion
When did people first know about archaebacteria?
A. 1999
B. 1988
C. 1977
D. 1966
Answer:
1977 is when people first knew about archaebacteria
Answer:
it was actually discovered in 1922
they didnt know what it actually was until 1977.
C.1977
Explanation:
why do cells divide even after an organism reaches adulthood?
Answer:
The answer is most definitely the second option or "B". This is because, how you think you grow fingernails, or skin over a wound.
The answer is 2nd option ,full grown organisms need to replace aging and damaged cells
Who first used the word “atomos” to describe the smallest unit of a substance?
Answer:
Democritus
Explanation:
Democritus was a Greek philosopher and is still remembered for his contribution towards the atomic structure of the universe. He first described the smallest unit of a substance and named it as "atomos".
Answer:
Democritus is correct
Explanation:
PLEASE HELP I WILL GIVE BRAINALIST
Answer:
A. identical
Explanation:
because it is replicating meaning it is going to look the same and be identical.
Can someone help with this?
Answer:
a primary oocyte contains 46 chromosomes, while a secundary oocyte contains 23 chromosomes
What does archaebacteria mean?
A. Ancient bacteria
B. Ancient Protist
C. New bacteria
Answer:
A. Ancient bacteria
Explanation:
From the salt of the earth, researchers have isolated and revived a Bacillus strain, which they believe is >250 million years old. If correct, Russell Vreeland and his colleagues from West Chester University, Pennsylvania, have discovered the oldest living organism in the world.
Answer:
A. Ancient bacteria
Explanation:
Archae bacteria means ancient bacteria. So, option (A) is the correct answer.
Which of the following did you include in your answer?
What causes the formation of a cervical plug a testorone b progesterone c luteal d estroge e follicle
Answer:
b progesterone
Explanation:
The plug is formed as soon as there is implantation of fertilized eggs. The thickness of the cervical mucus becomes different as hormone levels changes in pregnancy.
The progesterone, encourages the production of thick fluid/ mucus which brings about the formation of a plug. This prevents bacteria from getting into the uterine cavity.
Answer: The correct option is B (progesterone).
Explanation:
The cervix is the ring of muscles also called the neck of the uterus in female reproductive system. This protrudes through the anterior wall of the vagina, opening into it at the external os.
After the fertilization of the ovum by the spermatozoa, the uterus prepares for the implantation which results from the secretion of hormones. Under the influence of oetrogen, secreted by the developing follicle, the cells of the endometrium divide rapidly causing the endometrium to build up and thicken.
While the viscosity of cervical mucus changes in response to hormone levels and during pregnancy, progesterone fosters the production of highly viscous mucus resulting in the formation of a plug that forms a physical barrier to bacteria and prevents their ascension into the uterine cavity. This plug is called CERVICAL PLUG.
what happens to the energy that is not converted to usable energy in a muscle Cell?
Answer:
The process is called oxidative phosphorylation and it happens inside mitochondria. In the matrix of mitochondria the reactions known as the citric acid or Krebs cycle produce a chemical called NADH. NADH is then used by enzymes embedded in the mitochondrial inner membrane to generate adenosine triphosphate (ATP).
Explanation:
why is it difficult to farm in tilted/inclined landscapes?
Answer:
Farming can lead to the loss of natural habitats.This is destroying natural habitats and changing the very nature and look of our rural landscape.
hope it helps
It is difficult to farm in an incline landscape because initial cost is high, high operational cost, Limited crops can be grown. Thus, due to these following reason, inclined farming becomes difficult.
What is vertical farming?Vertical farming is a practice of growing crops on a hilly or incline land.
However, it may have some disadvantages like high operational cost, high labor cost, only a limited number of crops can be grown.
Hence, due to these reason, tilted farming is difficult.
Learn more about vertical farming
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The template strand for a new DNA molecule reads 5' CCTGAATT 3'. What will be the nitrogen base sequence for the complementary strand created during DNA replication?
Answer:
3' GGACTTAA 5'
Explanation:
because Adenine always pair with Thymine and Cytosine with guanine. u can also remember them as Apple Tree and Car Garage
Question 5 of 5
Which thermoregulation strategy helped the hummingbird decrease its body
temperature?
A. Resting in the shade
B. Flying
C. Basking in the sun
D. Eating
Answer: A
Explanation:
Answer:
A, Resting in the shade
Explanation:
100% Correct, A p e x
Hope This Helps! <3
The state of maintaining a stable internal environment regardless of changing external conditions is called
The state of maintaining a stable internal environment regardless of changing external conditions is called [tex]\boxed{ homeostasis }[/tex].
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Los animales toman del medio los materiales necesarios para sus actividades vitales. Estas funciones la realizan: A. El aparato circulatorio. B. El aparato circulatorio, digestivo y respiratorio. C. El aparato respiratorio. D. El aparato respiratorio y circulatorio.
Answer:
C. El sistema respiratorio.
Explicación:
El sistema respiratorio es un tipo de sistema en el que los animales toman del medio ambiente los materiales necesarios para sus actividades vitales. Los pulmones son el órgano principal del sistema respiratorio en el que el gas de oxígeno entra al cuerpo y se almacena en los pulmones a través de la inhalación. La hemoglobina que extrae el gas de dióxido de carbono de la célula lo desecha en los pulmones y carga el oxígeno necesario para el proceso de respiración. El dióxido de carbono se elimina de los pulmones mediante la exhalación.
how does the mitochondria lysosomes and golgi apparatus work together
Answer:
The mitochondria segregate the Golgi from lateral regions of the plasma membrane, the nucleus, and the cytoplasm. The mitochondria and the golgi structures from very close contacts, and these contacts remain stable over time.
if the sun is a source of EM radiation , how come only some of the EM strikes the surface of the earth
Answer:
Some EM radiation is absorbed by the atmosphere
Explanation: