stacysadousky
14.01.2021 •
Biology
1. Which of the following is an example of a heritable characteristic (or inheritable trait) possessed by an animal that will improve its reproductive potential and survivability in its environment?
a. Position of geese flying in V formation
b. Color and shape camouflage of praying mantis
c. Muscle atrophy in aging dogs
d. Male dominance in a pack of wolves
2. There are several species of salamanders in Austin, Texas that have adapted for life in underground caves. These salamanders usually have small, nonfunctional eyes. Scientists studying biological evolution consider the salamanders' eyes to be an example of —.
a. a vestigial organ
b. a genetic mutation
c. an analogous structure
d. an incomplete adaptation
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Ответ:
Steps involved in cDNA synthesis (Reverse Transcription)
Explanation:
1. Mature mammalian mRNA is isolated and used as a template
2. Enzyme Reverse transcriptase binds to the mRNA Template provided with the help of a primer, then synthesizes a first strand of cDNA without introns
3. The original mRNA template is hydrolyzed by raising the pH
4. To make a double strand DNA, A primer site is created on the single-stranded cDNA (first strand)
5. DNA polymerase synthesizes a new strand that is complementary to the first cDNA strand, forming a double-stranded cDNA molecule