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masya89 [10]
3 years ago
13

Select the true statement. A) RNA is mostly single-stranded; DNA is always double-stranded. B) RNA and DNA usually have identica

l nitrogenous bases. C) Several types of DNA help regulate protein synthesis.
Biology
2 answers:
muminat3 years ago
5 0

Answer: The correct answer is -

A) RNA is mostly single-stranded; DNA is always double-stranded.

Explanation:

DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are the two different forms of nucleic acid that carry the genetic information in the form of nucleotide sequences.

RNA is generally single stranded that is it has a single strand of nucleotide sequences (for example, genome of human immuno deficiency virus is single stranded RNA).

On the contrary, DNA always occurs in double stranded form (such as genetic material of human beings) that is it has two strands of nucleotide sequences, which are antiparallel or complementary to each other.

Thus, A) option is the right answer.

Keith_Richards [23]3 years ago
3 0
A is true, the others are not. I would assume they count the mRNA and tRNA in protein synthesis as 'double stranded'
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All of the following are differences between RNA and DNA except
lions [1.4K]

Answer:

A

Explanation:

both DNA and RNA are nucleic acids

8 0
2 years ago
Now that you have identified the components of DNA, can you describe how these components bind together to form a DNA molecule?
omeli [17]

The question is incomplete. The complete question is attached below.

Answer:

1. DNA is the polymer of deoxyribonucleotides that contain the nitrogenous base, pentose sugar and phosphate group. The phosphate is attached with the 3 C position of the deoxyribose sugar. This leads to teh formation of phosphodiester bond.

2. The DNA backbone consists of phosphate and sugar. The nitrogenous bases are inserted inside the DNA molecule. These nitrogenous bases are linked together by the hydrogen bonds.

3. The adenine binds requires two hydrogen bonds to bind with thymine. This provide complementary nature to the DNA molecule. Uracil is present instead of thymine in RNA .

4. The guanine binds requires three hydrogen bonds to bind with cytosine. More amount of energy is required to break their bonds.

8 0
3 years ago
Peripheral resistance depends on all of the following factors except __________.
pantera1 [17]

Options for the question have not been given. They are as follows:

blood vessel length

blood viscosity

blood vessel diameter

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Answer:

blood colloid osmotic pressure

Explanation:

  • Peripheral resistance is the resistance to blood flow by blood vessels.
  • It is directly proportional to blood vessel length as more the distance to travel, more will be the resistance.
  • It is also directly proportional to blood viscosity as more energy is required to push viscous material.
  • It is indirectly proportional to blood vessel diameter. More the diameter of the vessel, easier it is for the blood to pass.
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The genotype is the genetic makeup of a cell, an organism, or an individual usually with reference to a specific characteristic
Whitepunk [10]
That is a true statement.
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3 years ago
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