BSCS Biology: A Molecular Approach

Chapter 9: Expressing Genetic Information

Chapter Test

1.
Which of the following distinguishes RNA from DNA?
A)It stores genetic information.
B)There are multiple types of RNA.
C)It is a nucleic acid.
D)It is a biomolecule.
2.
The genetic code is expressed in ____.
A)anticodons
B)codons
C)amino acids
D)transcription code
3.
Which of the following triplets is the starting point for translation?
A)UAG
B)UGA
C)UAA
D)AUG
4.
What is the main role of hormones in an organism?
A)to catalyze chemical reactions
B)to regulate behavior in another part of the organism
C)to bind to specific molecules
D)to serve as the material that makes cell structures or tissues
5.
Which of the following is not a stage in the transcription of RNA from a DNA template?
A)elongation
B)exonation
C)initiation
D)termination
6.
Why are introns an evolutionary advantage?
A)They provide a way for new catalyst enzymes to process chemical reactions.
B)They allow RNA to break down in the nucleus after it has done its work, allowing the cell to function more efficiently.
C)They correct exon splicing errors and prevent harmful mutations.
D)They provide a way to make new combinations of the coding parts of genes.
7.
What is the signal sequence?
A)The part of the ribosome that signals the protein to enter the ER.
B)The part of the protein sequence that directs the protein to the correct location inside or outside the cell.
C)The first few amino acids that signal the protein to leave the cell.
D)The receptor protein in the ER membrane that directs the protein to its final destination.
8.
What sequence of amino acids would result from a reading frame of A AAU CGG CUA AA?
A)serine, glutamine, glutamate
B)glycine, glutamate, valine
C)asparagine, arginine, leucine
D)asparagine, methionine, leucine
9.
Which of the following best describes a virus?
A)A single gene surrounded by a mutated cell.
B)A prokaryotic cell that is much smaller than a bacteria cell.
C)A bit of DNA or RNA enclosed in a protein coat.
D)A DNA and RNA sequence wrapped in a protein.
10.
Which of the following is not a reason that viruses threaten cells?
A)They replicate quickly.
B)They evolve rapidly.
C)They can remain hidden inside cells for short- or long- time periods.
D)They release proteins that slow the metabolism of cells.
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