Biology Chapter 10 Part 2 Question Preview (ID: 23786)
Nucleic Acids And Protein Synthesis.
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If a DNA molecule is 22% cytosine, how much guanine is present in the molecule?
a) 22%
b) 78%
c) 39%
d) 0%
If a RNA molecule is 32% adenine, how much thymine is present in the molecule?
a) 32%
b) 36%
c) 16%
d) 0%
What is the first step of DNA replication?
a) RNA polymerase binds to the promoter region
b) DNA polymerase unwinds and separates the strands of DNA
c) Helicase unwinds and separates the strands of DNA
d) RNA polymerase initiates transcription
Amino acids are linked together by peptide bonds
a) True
b) False
c)
d)
What is the significance of the start codon and the stop codon?
a) They mark the beginning and end of a gene on a DNA molecule
b) They mark the beginning and end of a gene on a RNA molecule
c) Nothing, they are rather insignificant
d) They mark the starting and stopping points for transcription
What is the difference between a termination signal and a stop codon?
a) Nothing, they can be used interchangeably
b) The termination signal marks the end of a gene on DNA and the stop codon marks the end of a gene on RNA
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) Termination signals are used in translation and the stop codon is used in transcription
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
What occurs during transcription?
a) mRNA is made from DNA
b) a polypeptide chain is made from mRNA
c) tRNA leaves the cell
d) rRNA reads a strand of mRNA
What occurs during translation?
a) mRNA is made from DNA
b) a polypeptide chain is made from an mRNA sequence
c) tRNA leaves the cell
d) rRNA reads a strand of mRNA
Which of the following describes the structure and function of rRNA?
a) A single, uncoiled chain of nucleotides that carries genetic information from the nucleus to the site of translation
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 double helix containing the information to make proteins
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 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 double helix containing the information to make proteins
Which of the following describes the structure and function of mRNA?
a) A single, uncoiled chain of nucleotides that carries genetic information from the nucleus to the site of translation
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 double helix containing the information to make proteins
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) 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 double helix containing the information to make proteins
The genetic code specifies the correlation between
a) A DNA nucleotide sequence and an RNA nucleotide sequence
b) an mRNA nucleotide sequence and a tRNA nucleotide sequence
c) an mRNA nucleotide sequence and an rRNA nucleotide sequence
d) an RNA nucleotide sequence and an amino acid sequence
RNA is copied from DNA in the
a) cytosol
b) nucleus
c) nuclear membrane
d) ribosome
Phosphate groups are linked to sugars in DNA and RNA molecules by
a) ionic bonds
b) hydrogen bonds
c) peptide bonds
d) covalent bonds
During translation, one end of a tRNA molecule pairs with a complementary
a) nucleotide sequence in DNA
b) mRNA codon
c) tRNA molecule
d) protein molecule
A protein is a polymer consisting of a specific sequence of
a) amino acids
b) fatty acids
c) RNA nucleotides
d) DNA nucleotides
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-C-C-G-A-T-T
b) C-C-G-A-T-T-G
c) A-A-U-C-G-G-U
d) A-A-T-C-G-G-T
Which of the following are purines?
a) DNA and RNA
b) adenine and guanine
c) adenine and thymine
d) cytosine and thymine
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