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Curriculum and course: Biology

Curriculum and course: Biology

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Chapter 2 - Molecular Biology and Earth Science1 Annotated lessons + question banks and assessments

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Lesson 1 Quiz: DNA Structure, Genetic Engineering and Earth Science

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  • Questions count: 4
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1.
If a double-stranded DNA sample contains 28% Adenine, what is the exact percentage of Cytosine in this sample?
22%
56%
44%
28%
2.
Which enzyme is responsible for linking Okazaki fragments into a continuous strand during lagging strand replication?
DNA Polymerase
Reverse Transcriptase
DNA Helicase
DNA Ligase
3.
What is the structural characteristic of a restriction endonuclease recognition site?
It contains only adenine and thymine bases.
It always begins with the start codon AUG.
It is a palindromic sequence reading identical 5' to 3' on both strands.
It consists of 15-20 repetitive nucleotides.
4.
Why is the genetic code described as 'degenerate' or 'redundant'?
One codon can code for multiple different amino acids.
The genetic code decays as the cell ages.
The genetic code differs completely between bacteria and humans.
Multiple different codons can code for the same single amino acid.
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