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Biology Chapter 10 Part 2
Test Description: Nucleic Acids and Protein Synthesis
Instructions: Answer all questions to get your test result.
1) If a DNA molecule is 22% cytosine, how much guanine is present in the molecule?
A
0%
B
39%
C
78%
D
22%
2) If a RNA molecule is 32% adenine, how much thymine is present in the molecule?
A
36%
B
16%
C
0%
D
32%
3) What is the first step of DNA replication?
A
DNA polymerase unwinds and separates the strands of DNA
B
RNA polymerase binds to the promoter region
C
RNA polymerase initiates transcription
D
Helicase unwinds and separates the strands of DNA
4) Amino acids are linked together by peptide bonds
A
False
B
True
5) What is the significance of the start codon and the stop codon?
A
They mark the starting and stopping points for transcription
B
They mark the beginning and end of a gene on a RNA molecule
C
They mark the beginning and end of a gene on a DNA molecule
D
Nothing, they are rather insignificant
6) What is the difference between a termination signal and a stop codon?
A
Nothing, they can be used interchangeably
B
Termination signals are used in translation and the stop codon is used in transcription
C
The termination signal marks the end of a gene on RNA and the stop codon marks the end of a gene on DNA
D
The termination signal marks the end of a gene on DNA and the stop codon marks the end of a gene on RNA
7) What is true about the structures of both, DNA and RNA?
A
They have a double helix shape
B
They are contain the sugar deoxyribose
C
They are contain the nitrogen-containing bases: Adenine, thymine, guanine and cytosine
D
Phosphate groups and sugars make up the backbone of the molecules
8) What occurs during transcription?
A
tRNA leaves the cell
B
rRNA reads a strand of mRNA
C
a polypeptide chain is made from mRNA
D
mRNA is made from DNA
9) What occurs during translation?
A
a polypeptide chain is made from an mRNA sequence
B
rRNA reads a strand of mRNA
C
mRNA is made from DNA
D
tRNA leaves the cell
10) Which of the following describes the structure and function of rRNA?
A
A double helix containing the information to make proteins
B
Nucleotides folded into a hairpin shape and binds to amino acids
C
Nucleotides in a globular form that along with proteins makes up ribosomes
D
A single, uncoiled chain of nucleotides that carries genetic information from the nucleus to the site of translation
11) Which of the following describes the structure and function of tRNA?
A
A single, uncoiled chain of nucleotides that carries genetic information from the nucleus to the site of translation
B
Nucleotides in a globular form that along with proteins makes up ribosomes
C
Nucleotides folded into a hairpin shape and binds to amino acids
D
A double helix containing the information to make proteins
12) Which of the following describes the structure and function of mRNA?
A
Nucleotides folded into a hairpin shape and binds to amino acids
B
Nucleotides in a globular form that along with proteins makes up ribosomes
C
A double helix containing the information to make proteins
D
A single, uncoiled chain of nucleotides that carries genetic information from the nucleus to the site of translation
13) Which of the following describes the structure and function of DNA?
A
A single, uncoiled chain of nucleotides that carries genetic information from the nucleus to the site of translation
B
A double helix containing the information to make proteins
C
Nucleotides in a globular form that along with proteins makes up ribosomes
D
Nucleotides folded into a hairpin shape and binds to amino acids
14) The genetic code specifies the correlation between
A
an mRNA nucleotide sequence and a tRNA nucleotide sequence
B
an RNA nucleotide sequence and an amino acid sequence
C
an mRNA nucleotide sequence and an rRNA nucleotide sequence
D
A DNA nucleotide sequence and an RNA nucleotide sequence
15) RNA is copied from DNA in the
A
nuclear membrane
B
nucleus
C
cytosol
D
ribosome
16) Phosphate groups are linked to sugars in DNA and RNA molecules by
A
peptide bonds
B
covalent bonds
C
hydrogen bonds
D
ionic bonds
17) During translation, one end of a tRNA molecule pairs with a complementary
A
mRNA codon
B
tRNA molecule
C
nucleotide sequence in DNA
D
protein molecule
18) A protein is a polymer consisting of a specific sequence of
A
DNA nucleotides
B
RNA nucleotides
C
amino acids
D
fatty acids
19) If the sequence of nucleotides in one chain of a DNA molecule is T-T-A-G-C-C-A, a new nucleotide chain will be produced during replication with the complementary sequence ______________.
A
A-A-U-C-G-G-U
B
A-A-T-C-G-G-T
C
A-C-C-G-A-T-T
D
C-C-G-A-T-T-G
20) Which of the following are purines?
A
cytosine and thymine
B
adenine and guanine
C
adenine and thymine
D
DNA and RNA
*select an answer for all questions
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