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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 – DNA Structure, Genetic Engineering and Earth Science — Lesson quiz

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  • Questions count: 8
  • Passing grade: 60%
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1.
If a double-stranded DNA sample contains 28% Adenine, what is the exact percentage of Cytosine in this sample?
56%
28%
22%
44%
2.
Which enzyme is responsible for linking Okazaki fragments into a continuous strand during lagging strand replication?
DNA Ligase
Reverse Transcriptase
DNA Polymerase
DNA Helicase
3.
What is the structural characteristic of a restriction endonuclease recognition site?
It always begins with the start codon AUG.
It consists of 15-20 repetitive nucleotides.
It is a palindromic sequence reading identical 5' to 3' on both strands.
It contains only adenine and thymine bases.
4.
Why is the genetic code described as 'degenerate' or 'redundant'?
One codon can code for multiple different amino acids.
Multiple different codons can code for the same single amino acid.
The genetic code decays as the cell ages.
The genetic code differs completely between bacteria and humans.
5.
If a double-stranded DNA sample contains 28% Adenine, what is the exact percentage of Cytosine in this sample?
56%
28%
22%
44%
6.
Which enzyme is responsible for linking Okazaki fragments into a continuous strand during lagging strand replication?
DNA Ligase
Reverse Transcriptase
DNA Polymerase
DNA Helicase
7.
What is the structural characteristic of a restriction endonuclease recognition site?
It always begins with the start codon AUG.
It consists of 15-20 repetitive nucleotides.
It is a palindromic sequence reading identical 5' to 3' on both strands.
It contains only adenine and thymine bases.
8.
Why is the genetic code described as 'degenerate' or 'redundant'?
One codon can code for multiple different amino acids.
Multiple different codons can code for the same single amino acid.
The genetic code decays as the cell ages.
The genetic code differs completely between bacteria and humans.
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