1. Which of the following is a characteristic of restriction enzymes? Most restr
ID: 72070 • Letter: 1
Question
1. Which of the following is a characteristic of restriction enzymes?
Most restriction enzymes recognize a single site.
The restriction site is recognized regardless of the source of the DNA.
Many restriction enzyme sites are palindromes.
All the above
a and b only
2.
Mitochondrial DNA differs from nuclear DNA in that:
its nitrogenous bases include adenine, cytosine, guanine, and uracil.
it has an extra histone protein associated with it leading to greater supercoiling.
it lacks repair mechanisms, introns, and does not cross over.
it is found in the lysosomes of eukaryotic cells.
it is identical in every cell of a multicellular organism.
3.
Common red-green color blindness is an X-linked trait. If a woman with normal color vision whose father is color blind married a man with normal color vision. If this couple had a son, what is the probability that he will be color blind?
0%
25%
50%
75%
100%
Most restriction enzymes recognize a single site.
The restriction site is recognized regardless of the source of the DNA.
Many restriction enzyme sites are palindromes.
All the above
a and b only
2.
Mitochondrial DNA differs from nuclear DNA in that:
its nitrogenous bases include adenine, cytosine, guanine, and uracil.
it has an extra histone protein associated with it leading to greater supercoiling.
it lacks repair mechanisms, introns, and does not cross over.
it is found in the lysosomes of eukaryotic cells.
it is identical in every cell of a multicellular organism.
3.
Common red-green color blindness is an X-linked trait. If a woman with normal color vision whose father is color blind married a man with normal color vision. If this couple had a son, what is the probability that he will be color blind?
0%
25%
50%
75%
100%
Explanation / Answer
1). d. All the above
Most restriction enzymes recognize a single site. ----------> TRUE
The restriction site is recognized regardless of the source of the DNA --------> TRUE
Many restriction enzyme sites are palindromes. -----------> TRUE
Restriction enzymes cleave the DNA at specific locations. These restriction enzymes are widely used to get the genome of specific site, which is used in genetic engineering (for making recombinant DNA, etc). In order to select a restriction enzyme, first we should read the nucleotide sequence of gene of interest and then identify the restriction enzyme sites. Based on these restriction enzyme sites, we will select the restriction enzymes because the restriction site is specific for each restriction enzyme.
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