Why isn't it possible for adenine to pair with cytosine
or guanine?

Answers

Answer 1

Both bases need to twist hard to facilitate the hydrogen bond which is energetically expensive event; thus hydrogen bonds forming functional groups are not complementary in adenine and cytosine

Answer 2
the hydrogen bonds forming functional groups are not complementary in adenine and cytosine. it also has to do with structure because adenine and guanine are purines and cytosine and thymine are pyrimidines.

Related Questions

A model that shows a single sequence of feeding relationships is called a

Answers

Answer:

Food Chain

Explanation:

Thanks a lot one question I forgot the answer too correct answer get Brainly facts

Answers

Explanation:

Gene expression is the process by which the genetic code - the nucleotide sequence - of a gene is used to direct protein synthesis and produce the structures of the cell. Genes that code for amino acid sequences are known as 'structural genes'.

Which of these domains consist (s) of prokaryotes?

1. Bacteria
2. Archaea
3. Eukarya

Answers

The answer is infact Number 3. Eukarya.

The spores are asexual reproductive bodies.

a. True
b. False

Answers

Explanation:

Spore, a reproductive cell capable of developing into a new individual without fusion with another reproductive cell. ... Spores are agents of asexual reproduction, whereas gametes are agents of sexual reproduction. Spores are produced by bacteria, fungi, algae, and plants.

A ! true nоыоылыоыьыбяб


Exercise
1. Fill in the blank spaces with suitable words.

(b) The sun ray should not directly focus on________.

(c) Rough surface produces ________reflection of light.

(d) Plane mirror forms_______.

Answers

Answer:

I’m not exactly sure, but I think the answer is

For the first, I think it would be Smooth surfaces

Second, I think the answer is No reflection of light

And the third, Reflections

I hope this helps, but don’t trust this 100%

Explanation:

Please give me brainliest

Answer:

1)iris

2) irregular/diffused

3) virtual image

what can we expect to happen to these strawberry plants

Answers

Answer:

I think you forgot to include a photo but.

The plant will absorb water and sun as the strabbaries slowly develop, once they are finished they will soon be eaten by predadores.  

Name one example of an enzyme in the human body and it's function.

Answers

Answer:

A couple of examples

amylase: break down starch into sugar.

protease: break down proteins into amino acids.

lipase: break down lipids (fats and oils) into fatty acids and glycerol.

what are chromosomes and how are they coiled? Please Help!

Answers

The answer got to be square why because if you add the prosses and simplify by the square root of 6 and then multiply it by itself then you get square makes sense ???

Answer:

Yo Cam and Josh, i don't think i will be able to talk to ya'll anymore bc i have a lot to do in school.

Explanation:

how are cardiac muscle cells unique to other cells

Answers

because muscle cells are striated due to a similar arrangement of contractile proteins. Unique to the cardiac muscle are a branching morphology and the presence of intercalated discs found between muscle fibers.


hopes this helps :)


Identify the parts of the Sun labeled A, B, C, D, and E.
Label A
Label B
Label C
Label D
Label E

Answers

Layer A- CORE
Layer B- RADIATIVE ZONE
layer C- CONVECTIVE ZONE
Layer D- PHOTOSPHERE
Layer E- CHROMOSPHERE

Answer:

Label A  

✔ Nucleus

Label B  

✔ Lysosome

Label C  

✔ Ribosomes

Label D  

✔ Centrioles

Explanation:

NEED HELP ASAP PLEASE ‼️‼️‼️‼️‼️‼️‼️‼️ IL CASH APP 10$ IF CORRECT PLZ I NEED HELP

Answers

the answer is B) TRNA !!

Explain the processes that occur during the cycle

Answers

Answer:

hope this helps

Explanation:

The cell cycle has two major phases: interphase and the mitotic phase (Figure 1). During interphase, the cell grows and DNA is replicated. During the mitotic phase, the replicated DNA and cytoplasmic contents are separated, and the cell divides. ... During interphase, the cell grows and the nuclear DNA is duplicated.

show complete process of photosynthesis. PLS HELP GIVING 15 points for this

Answers

Hope this helped!! God bless!!!

HELPPPP what goes where??? will give brainliest to first/best answer please pleaseee

Answers

Answer:

it should go in this order (starting and going from left to right) [see explanation]

Explanation:

carbon dioxide and water are your reactants

sunlight should go in the blue box

glucose and oxygen are your products

hope this helped xx

Answer:

first one is carbon dioxide. The second one is water. The third one is sunlight. The fourth one is sugar. And the last one is oxygen

Explanation:

Which of the following is NOT a federal laboratory in the United States?
FBI Laboratory
DEA Laboratory
ATF Laboratory
US Navy Criminal Laboratory

Answers

Answer:

d, us navy

Explanation:

Which option is likely to take place when a person with a criminal past does not have the support of a good job or marriage?
A.
routine, structured life
B.
increased social control
C.
desistance to crime
D.
persistent criminality

Answers

The answer i see most fit is d

Answer:

D.  

persistent criminality

Explanation:

When you eat, the food provides you with which type of energy?

Answers

Answer:

The answer is chemical energy

Can different sequences of DNA result in the same protein (trait)?

Answers

Answer:

i guess ya

Explanation:

*(agriculture subject)*

explain why paddy should be well leveled​

Answers

Answer:A well-leveled field is seen as laying the foundation for a good water management. If a field is not properly leveled, water may stagnate in the lower parts whereas higher parts may get dry due to water receding.

Explanation:

Beginning with solar energy, detail how the transfer of energy drives weather and climate. Be sure to mention how energy transfer affects wind, rain, temperature, and climate.
Thank u in advance!! ^^

Answers

Answer:

Climates and weather activities are driven by solar energy. The option among all the options that are given in the question is the third option. It is a known fact that the surface of the earth is very not even, and this is the reason that the surface of the earth also absorbs solar energy differently.

Explanation:

Describe each layer of the earth in terms of Composition, state of matter.

Answers

core mantle and crust are divisions based on composition of the crust makes up less than 1% of Earth's biomass consistency of oceanic crust and continental crust is often More For Less sick Rock the mantle is hot and represents about 68% of its mass finally the core is mostly iron metal

Answer:

Top: Crust, Between both: Mantle, Middle of earth: Core.

Explanation:

I don't know how to describe the layers in terms of composition but i hope my answer helped

What is the source of the carbon dioxide that is used in photosynthesis?
sunlight
the soil
the atmosphere
the plant

Answers

Sunlight is the source of Carbon Dioxide

Answer:

C) the atmosphere

Explanation:

just took the quiz

What's the definition of dominant alleles?

Answers

Explanation:

I don't know that outed by a rider and then I also follow you promised please please

Answer:

In genetics, dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and the second recessive.

If the same types of fossils are found in two separate rock layers, it's likely that the two rock layers ____. a. formed at different times c. formed under different conditions b. are part of one continuous deposit d. none of the above Please select the best answer from the choices provided A B C D Mark this and return

Answers

Answer: B are the one continuous deposit

Explanation:

(50 points)SOMEONE I NEED HELP DON"T ANSWER IT IF YOU DON"T KNOW IT

Describe how long a results provide evidence of variations within a classroom population

Answers

Answer:

Hi! I think you already got your answer by now I really needed points so

thank you!

Explanation:

Hope you have a nice day!!

Describe the process of cell division

Answers

Answer:

it is the process where new cells are formed called as daughter cells from a single cell

Helpp!
the key to understanding how dna works is
A- to understand that each base only connects to another specific base.
B- to understand more about the sugar in each nucleotide.
C- to understand that it looks like a twisted ladder that spirals around.
D- to understand the role of the phosphate in each nucleotide.

Answers

Answer:

A

Explanation:

to understand that each base only connects to another specific base.

According to the passage, “The secret of DNA, or what Crick called 'the secret of life,' is that every A molecule on one side of the rung always connects to a T on the other side, while every G molecule connects to a C.”

PLEASE I REALLY NEED HELP IN THIS (42 POINT'S)

After conducting your experiment, answer the following questions:


What do you observe after twenty-four hours?

What two molecules (molecular species) are involved in this experiment?

In which region was the concentration of water greater—inside or outside the thistle tube—when you first set up the experiment? Explain.

Based on what you have learned about membranes and osmosis, how could you explain the results of this experiment?

Answers

can you explain a little more please

1. After twenty-four hours = water level rises more on the side with sugar than on the side without

2. Sucrose (C12H22O11 ) and water (H2O)

3. The concentration of water is higher OUTSIDE the tube at the start. That side of the membrane is 100% water, while the inside of the membrane is a solution of water and sugar.

4. Water moves through the semipermeable membrane from high concentration to low concentration to reach equilibrium in a process called osmosis. The sucrose cannot pass through the membrane because the molecules are too large, but water molecules are small enough to permeate the membrane. By the end of the experiment, the water has moved through the membrane into the thistle tube so that the sugar has been diluted with more water and the concentrations are equal.

Which of these is an example of an adaptation?
O A. A dog is trained to roll over on command.
O B. A horse breaks its leg while running.
O C. A camel has two rows of eyelashes to keep sand out of its eyes.
O D. A cat learns to eat from a bowl.

Answers

Answer:

C. A camel has two rows of eyelashes to keep sand out of its eyes

Hope this helps:)

Answer:

C camel

Explanation:

PLS HELP
What kind of lava comes out of Ring of Fire volcanoes??
A : runny lava.

B : smooth lava.

C : blocky lava.

D : bright lava.

Answers

Answer:

lava flows are very hot, thin and runny. When it cools is has a smooth to ropey texture because of the low silica content which makes it cool quickly. Pahoehoe flows creep along generally at less than 3 feet per minute but some flows have been measured at over 20 miles per hour.

Explanation:

it is A

Answer: Lavas at the Ring of Fire's stratovolcanoes are mainly andesite and basaltic andesite but dacite, rhyolite, basalt ,and some other rarer types also occur. Other types of volcano are also found in the Ring of Fire, such as subaerial shield volcanoes Explanation: Feat. Wikipedia

Other Questions
100 points brainlist thanks and please help me A Three-Point TurnChapter 1"You know, hardly anyone ever needs to do a three-point turn anymore," said Justin, trying to help Becky calm down."Oh, so it's not a useful skill AND I am probably going to fail the driving test because I can't do it anyway," Becky said, raising her voice for emphasis. "That should make me feel like a million bucks when I flunk."Justin was riding with Becky so she could take her driving test. He had volunteered for the job because he thought she would be less nervous with him than with their mom, but so far, he wasn't sure he was making any difference."Slow down, your turn is coming up here," he said, looking ahead."I know, I know," she replied, "I've been here before rememberthe last time I flunked."Justin was pretty sure if he had let her miss the turn, things would only have deteriorated further, but he wasn't sure he was fond of being the scapegoat for Becky's anxiety."Listen, you need to take a few deep breaths," he said, hoping he could help her at least relax a bit. "Being nervous won't help you with the three-point turn or anything else you have to do. Hey, did you just take that turn without your turn signal on?" This was going to be harder than he thought."Stop yelling at me," Becky replied, clearly frustrated, "I can't concentrate.""Look, you need to stop and get yourself together here," Justin started. "It is not just about passing the driving test. I don't want to get in an accident, so pull into that parking lot."Becky drove into the office building's parking lot where Justin was pointing. Justin knew they were less than a mile from the licensing office, and if she continued in this condition, he'd be having this same discussion three months from now when she tried the test again for the third time."You need to get a grip," he started after she put the car in park, "because you have studied and practiced driving all year. You know this stuff inside and out, backwards and forwards. What are you so nervous about?""I don't know, I don't know," Becky wailed, resting her head on the steering wheel. "I just get so tired of failing."Listening quietly as Becky sobbed, Justin realized this was about much more than a driving test. He also knew if he didn't find a way to help Becky things would just get worse.Chapter 2Justin took a deep breath and collected his thoughts. Becky was an unbelievably consistent straight-A student. It was Justin who got the bad grades in school, and Justin who had to repeat every math class he'd ever taken. It was Justin who wished he could get the grades Becky got. Some things came easier for Justin: He was athletic, handy with tools, and good at making the best of whatever life threw at him. Mom called him her "lemons into lemonade" kid. But for the most part, Becky succeeded easily, whereas Justin had to work and work to just get a passing grade.Rather than having Becky catalogue all the things she supposedly "failed" at, Justin decided to try an alternative approach, one that wouldn't remind him of all the ways he had failed."Okay, Becky, let's assume for a moment you fail this test again. What is the worst thing that could happen?" he asked."I would be the oldest kid at school without a license and be humiliated," she replied. Justin thought he heard a bit of panic in her voice but continued with his plan."Yes, but won't we still have to drive to school together for at least one more year anyway?" he asked."Yes, but..." she started."And who will know, if you don't tell anyone except your friends, that you don't have your license? You know Mom can't afford another car just for you, right?""Yes," she said quietly."So what difference does it make, really," he said. "Another three months to wait in the grand scheme of your life doesn't seem like all that long, right?""I suppose not," she said.Justin could tell she was breathing more slowly now. "Besides," he said, "I would miss all the practice driving with you," and for good measure he reached over and pinched her arm."Ow," she said, hitting back at him, "that hurt.""So let's go do this, okay?"Okay," she said. Becky cranked up the car, backed slowly out of the parking spot and drove up to the parking lot's exit. Justin noticed, as they waited for the traffic to clear, that she had remembered the turn signal.Using both Chapter 1 and Chapter 2 of "The Three-Point Turn," write a short essay explaining how Justin is able to convince Becky that flunking the driving test will not be all that bad. The measures of the angles of a triangle are shown in the figure below. Solve for x.(4x+6)36 #1Several political causes contributed to the American Revolution. Parliament passed acts that disturbed the colonists. These acts included the(A: Stamp Act(B: Tea Act(C: Quartering Act #2which required the colonists to provide food and shelter to the soldiers stationed in the colonies. Parliament also passed the Writs of Assistance, which allowed British officials to(A: Auction (B: Seize(C: Sell#3 the colonists ____ without prior notice.(A: Property(B: Savings (C: Jewelry WILL MARK BRAINLIESTPLS DONT SCAM >:( Which of these are associated with a sedentary lifestyle? Select the three correct answers. I A. Increased risk of diabetes B. Excellent physical and mental health O C. Increased risk of heart disease O D. Poor immune function what involves gathering and analyzing information related to the terrain and environment of enemy forces. Solve the following equation by factoring. 2x27x+3=0 The colonists in Texas were fighting for independence fromthe United States.Spain.Mexico. Kelly is using a compass and straightedge to perform the Geometric construction below.Which of the following best describes the figure Kelly is constructing? A telephone poll asked people whether they like playing golf. Of the 100 people polled,20 like playing golf. What percentage of the people like playing golf? PLEASE HELP I WILL GIVE BRAINLIST Answer the 2 questions in the picture using the lab.. :) BRAINLIEST TO CORRECT FASTTT3. Which of the following atoms would have the highest first ionization energy?a. Lib. Bec. Nad. Mg4. What is the name of the phenomenon in which electrons are ejected from the surface of a metal when light shines on the metal?a. Photoelectric effectb. Diffractionc. Quantizationd. Aufbau principle10. How many core electrons does this element have? 1s2 2s2 2p5a. 9b. 4c. 2d. 511. The electron configuration for a chlorine atom is: 1s2 2s2 2p6 3s2 3p5. What electron configuration represents the electrons that make up only the valence electrons for a chlorine atom?a. 1s^2 2s^2 2p^6b. 3s^2 3p^5c. 1s^2d. 1s^2 2s^2 2p^6 3s^2 A similarity between most women and men farmers in colonial America was that: O A. They controlled family property. O B. They wove cloth. O c. They used heavy plows. O D. They worked hard. explain how healthcare professionals can attempt to equalize the unequal partnership between the adult patient and the provider. Which statement correctly compares the function shown on this graph with the function y = 7x - 10? Plz help me with this Find the slope of the line that passes through each pair of points Which of the following would occur during the observation and description part of applying the scientific method?A. Careful documentation of the processB. A thoughtful conclusion based on resultsC. The posing of a question to be answered by the experimentD. Doing research to see what similar experiments other scientists have performed A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct Who was president of the United States at the time of the Mexican-American War?A) John AdamsB) James MadisonC) James MonroeD) James Polk