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GaryK [48]
3 years ago
7

Chargaff's rules of DNA structure states that

Biology
1 answer:
BlackZzzverrR [31]3 years ago
6 0
Chargaff's rules state that DNA from any cell of all organisms should have a 1:1 ratio of pyrimidine and purine bases and that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine. This is the base Pair Rule. The correct answer is <span>C. a=c,t=g.

Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help. 
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In which case would facilitated diffusion be needed?
melomori [17]

Answer:

The voltage-gated potassium channels associated with an action potential provide an example of what type of membrane transport?

A. Simple diffusion.

B.<u> Facilitated diffusion. </u>

C. Coupled transport.

D. Active transport.

You are studying the entry of a small molecule into red blood cells. You determine the rate of movement across the membrane under a variety of conditions and make the following observations:

i. The molecules can move across the membrane in either direction.

ii. The molecules always move down their concentration gradient.

iii. No energy source is required for the molecules to move across the membrane.

iv. As the difference in concentration across the membrane increases, the rate of transport reaches a maximum.

The mechanism used to get this molecule across the membrane is most likely:

A. simple diffusion.

<u>B. facilitated diffusion. </u>

C. active transport.

D. There is not enough information to determine a mechanism.

Carrier proteins - exist in two conformations, altered by high affinity binding of the transported molecule. Moves material in either direction, down concentration gradient (facilitated diffusion). EXAMPLE: GluT1 erythrocyte glucose transporter.

Channel proteins - primarily for ion transport. Form an aqueous pore through the lipid bilayer. May be gated. Moves material in either direction, down concentration gradient (facilitated diffusion). EXAMPLES: Voltage-gated sodium channel, erytrhocyte bicarbonate exchange protein.

This might be helpful... because I don't know anything about facilitated diffusion.

5 0
3 years ago
P Flag question
Lelechka [254]

Answer:

Co²+6H20+light =C6H12O6+O2

Explanation:

This is lysis reactionan so forms glucose and oxgen by water and co2

and in 2nd question plants need N² for growth

5 0
2 years ago
How do bacterial repair damaged DNA?
lukranit [14]

Answer:

Most damage to DNA is repaired by removal of the damaged bases followed by resynthesis of the excised region. Some lesions in DNA, however, can be repaired by direct reversal of the damage, which may be a more efficient way of dealing with specific types of DNA damage that occur frequently.

4 0
3 years ago
Explain what ATP is and how energy is stored/released by this molecule;
TEA [102]
ATP in biology stands for Adenosine triphosphate. It’s an energy carrying molecule found in the cells of all living things. It captures the chemical energy obtained from the breakdown of food molecules and then it releases it to other cellular processes
5 0
2 years ago
Which type of communication style would someone have if they worry about the thoughts and feelings of
ivanzaharov [21]

The type of communication style that someone would have if they worry about the thoughts and feelings of others rather than their own is passive.

C. passive

<u>Explanation:</u>

4 main communication styles are passive, aggressive, passive-aggressive and assertive. People with a passive communication style find it difficult to express themselves. They usually have the fear that their feelings won’t b respected and tend to behave in a way by considering the feelings of other people while ignoring their own.

Lack of eye contact,  poor body gesture etc are the signs of passive communication. The lack of ability to communicate outward often results in passive communicator’s getting misunderstood.

8 0
3 years ago
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