Biology 1001 lsu Final Exam WITH
VERIFIED CORRECT
ANSWERS/GRADED A+/ 2025
A sequence of three RNA bases can function as a(n) what?
(A) codon only
(B) anticodon only
(C) gene only
(D) codon or anticodon
(E) NONE of the above answers - Correct Answer(D) codon or anticodon
What is Messenger RNA (mRNA)?
(A) a nucleic acid that, by itself, codes for the primary structure of a protein.
(B) made directly from DNA during transcription.
(C) permanently incorporated into the structure of ribosomes.
(D) larger if the protein to be made has a longer amino acid sequence.
(E) NONE of the above answers - Correct Answer(B) made directly from DNA during
transcription.
The genetic material of some viruses, such as HIV, is not normal DNA but is instead
what component?
(A) RNA.
(B) protein.
(C) carbohydrate.
(D) lipid.
(E) single-stranded DNA. - Correct Answer(A) RNA.
In a wild-type strain of fruit flies, the length of a gene from the start to the stop codon is
2,000 DNA bases. Suppose an experiment indicated that the mRNA molecule
transcribed from this gene is much shorter (only 1,200 bases). What is the most likely
explanation for this?
(A) A mutation caused the formation of an extra stop codon in the gene.
(B) The mRNA was prematurely degraded.
(C) There are introns in the DNA that were cut out of the mRNA.
(D) The first 800 bases of DNA are always lost as it is transcribed into mRNA. (E)
NONE of the above answers - Correct Answer(C) There are introns in the DNA that
were cut out of the mRNA.
What does the process of Transcription do?
(A) synthesizing a DNA molecule from an RNA template.
(B) assembling an RNA molecule without a template.
(C) synthesizing an RNA molecule using a DNA template.
(D) synthesizing a protein using information from mRNA.
, (E) replicating a single-stranded DNA molecule. - Correct Answer(C) synthesizing an
RNA molecule using a DNA template.
What is the process of converting the "message" of mRNA into a sequence of amino
acids called?
(A) translation.
(B) transcription.
(C) activation.
(D) replication.
(E) repression - Correct Answer(A) translation.
Which of the following attaches to specific amino acids?
(A) ribosomal RNA
(B) DNA
(C) messenger RNA
(D) transfer RNA
(E) RNA polymerase - Correct Answer(D) transfer RNA
Why does your tongue does not grow hair?
(A) different genes are expressed in different tissues.
(B) skin cells have extra DNA that codes for hair proteins.
(C) the genes for hair proteins have been deleted from the cells of your tongue.
(D) saliva prevents hair from growing.
(E) NONE of the above answers - Correct Answer(A) different genes are expressed in
different tissues
The sequence of nitrogen-containing bases on one strand of DNA most directly
determines the sequence of what?
(A) fatty acids in a fat molecule.
(B) amino acids in a protein molecule.
(C) sugars in a polysaccharide molecule.
(D) bases in a protein molecule.
(E) NONE of the above answers - Correct Answer(B) amino acids in a protein molecule.
Each gene is specific for a particular type of protein. True or False?
(A) TRUE
(B) FALSE - Correct Answer(A) TRUE
Which of the following "reads" codons?
(A) RNA polymerase
(B) DNA
(C) messenger RNA
(D) transfer RNA
(E) NONE of the above answers - Correct Answer(D) transfer RNA
Which of the items below is NOT directly involved in translation?
VERIFIED CORRECT
ANSWERS/GRADED A+/ 2025
A sequence of three RNA bases can function as a(n) what?
(A) codon only
(B) anticodon only
(C) gene only
(D) codon or anticodon
(E) NONE of the above answers - Correct Answer(D) codon or anticodon
What is Messenger RNA (mRNA)?
(A) a nucleic acid that, by itself, codes for the primary structure of a protein.
(B) made directly from DNA during transcription.
(C) permanently incorporated into the structure of ribosomes.
(D) larger if the protein to be made has a longer amino acid sequence.
(E) NONE of the above answers - Correct Answer(B) made directly from DNA during
transcription.
The genetic material of some viruses, such as HIV, is not normal DNA but is instead
what component?
(A) RNA.
(B) protein.
(C) carbohydrate.
(D) lipid.
(E) single-stranded DNA. - Correct Answer(A) RNA.
In a wild-type strain of fruit flies, the length of a gene from the start to the stop codon is
2,000 DNA bases. Suppose an experiment indicated that the mRNA molecule
transcribed from this gene is much shorter (only 1,200 bases). What is the most likely
explanation for this?
(A) A mutation caused the formation of an extra stop codon in the gene.
(B) The mRNA was prematurely degraded.
(C) There are introns in the DNA that were cut out of the mRNA.
(D) The first 800 bases of DNA are always lost as it is transcribed into mRNA. (E)
NONE of the above answers - Correct Answer(C) There are introns in the DNA that
were cut out of the mRNA.
What does the process of Transcription do?
(A) synthesizing a DNA molecule from an RNA template.
(B) assembling an RNA molecule without a template.
(C) synthesizing an RNA molecule using a DNA template.
(D) synthesizing a protein using information from mRNA.
, (E) replicating a single-stranded DNA molecule. - Correct Answer(C) synthesizing an
RNA molecule using a DNA template.
What is the process of converting the "message" of mRNA into a sequence of amino
acids called?
(A) translation.
(B) transcription.
(C) activation.
(D) replication.
(E) repression - Correct Answer(A) translation.
Which of the following attaches to specific amino acids?
(A) ribosomal RNA
(B) DNA
(C) messenger RNA
(D) transfer RNA
(E) RNA polymerase - Correct Answer(D) transfer RNA
Why does your tongue does not grow hair?
(A) different genes are expressed in different tissues.
(B) skin cells have extra DNA that codes for hair proteins.
(C) the genes for hair proteins have been deleted from the cells of your tongue.
(D) saliva prevents hair from growing.
(E) NONE of the above answers - Correct Answer(A) different genes are expressed in
different tissues
The sequence of nitrogen-containing bases on one strand of DNA most directly
determines the sequence of what?
(A) fatty acids in a fat molecule.
(B) amino acids in a protein molecule.
(C) sugars in a polysaccharide molecule.
(D) bases in a protein molecule.
(E) NONE of the above answers - Correct Answer(B) amino acids in a protein molecule.
Each gene is specific for a particular type of protein. True or False?
(A) TRUE
(B) FALSE - Correct Answer(A) TRUE
Which of the following "reads" codons?
(A) RNA polymerase
(B) DNA
(C) messenger RNA
(D) transfer RNA
(E) NONE of the above answers - Correct Answer(D) transfer RNA
Which of the items below is NOT directly involved in translation?
