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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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In hamsters, there is a dominant allele (S) for smooth fur and a recessive allele (s) for spiky fur. A unique characteristic of
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<em>What are the allele frequencies in this population?</em>

  • Frequency of S = 0.625  
  • Frequency of s = 0.375

<em>In the next generation of 1000 hamsters, what are the expected genotype frequencies?</em>

  • Frequency (SS) = 0.39          
  • Frequency (Ss) = 0.47          
  • Frequency (ss) = 0.14  

<em>What are the expected number of each genotype in the next 1000 hamsters?</em>

  • Individuals SS =  390
  • Individuals Ss =  469
  • Individuals ss =  140

<em>Have the allele frequencies changed?</em> No, they are the same

<em>Is the population in Hardy-Weinberg equilibrium?</em> Yes, it is.  

<em>The expected genotype frequency of Ss (2pq) in the next generation is expected to be: </em>0.469 (option a)

<em>The expected number of smooth fur hamsters (SS) in the next generation of 1000 hamsters is</em>: 390

Explanation:

Due to technical problems, you will find the complete answer and explanation in the attached files.  

     

Download pdf
3 0
2 years ago
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