biol exam 4 MC Flashcards
_______ mediate most of cell’s functions.
A. Carbohydrates
B. DNA
C. Lipids
D. Proteins
E. RNA
D. Proteins
RNA processing does not include _____.
A. Addition of 5’ cap
B. Coding of 5’ UTR
C. Inclusion of specific exons
D. Removal of introns
E. Splicing of primary transcript
B. Coding of 5’ UTR
Thymine dimers are indicative of ____.
A. Deletion
B. Frameshift
C. Inversion
D. UV damage
E. Missense
D. UV damage
Chromosomal mutation categories include all of the
following, except ____.
A. Deletion
B. Duplication
C. Inversion
D. Missense
E. Translocation
D. Missense
Which of the following is not one of the three critical
RNA processing steps in eukaryotes?
A. Splicing
B. Addition of 5’ cap
C. Addition of poly-A tail
D. Addition of Shine-Dalgarno sequence
D. Addition of Shine-Dalgarno sequence
An apoenzyme is a protein that may be missing any of
the following, except ____.
A. Cofactors
B. Other protein sub-units
C. Prosthetic groups
D. Core protein
D. Core protein
The number of unique proteins made in the human
body is a lot greater than the ~25,000 genes in the
human genome because of _____.
A. 5’ UTR
B. Alternative splicing
C. Selection
D. Fitness
E. Different sigma
B. Alternative splicing
Which of the following terms indicates a presence of
histones.
A. Genome
B. Chromatin
C. DNA
D. Regulatory region
E. Phenotype
B. Chromatin
____ can create multiple types of proteins from a
single gene.
A. Alternative splicing
B. Polyribosome
C. RNA polymerase
D. tRNA
E. 5’ UTR
A. Alternative splicing
A gene has 12 exons. Assume that each exon could be
included or excluded from the mRNA. How many
combinations are possible?
A. 2 + 12
B. 20,000 ^ 10
C. 2 ^ 12
D. 12 ^ 2
E. 2 * 12
D. 12 ^ 2
Which of the following is NOT needed to initiate
transcription in bacteria?
A. DNA template
B. Helicase
C. Promoter sequence
D. RNA polymerase
E. Sigma protein
B. Helicase
Assume that for the arginine mutation experiment, all
mutants required arginine to grow. This could possibly
mean that _____.
A. Mutations do not determine protein function
B. There are multiple proteins involved in synthesis
of arginine
C. All mutations were in a single gene
D. “One gene, one protein” hypothesis is wrong
C. All mutations were in a single gene
Change of a single amino acid in a polypeptide would
be due to _______ mutations.
A. Codon amplification
B. Frameshift
C. Nonsense
D. Silent
E. Missense
E. Missense
The Genetic Code is all of the following except _____.
A. Conservative
B. Domain specific
C. Non-overlapping
D. Redundant
E. Unambiguous
B. Domain specific
Which of the following statements about spliceosomes
is incorrect.
A. contain snRNPs.
B. contain both proteins and RNA.
C. make a lariat (loop) with the intron sequence.
D. are similar in all species on Earth.
E. remove all introns and sometimes exons as well.
D. are similar in all species on Earth.
Which of the following open reading frame (ORF) has
the potential to transcribe a large protein?
A. Does not have an AUG.
B. Has lots of stop codons.
C. Has a stop codon next to an AUG.
D. Has a stop codon far downstream of an AUG
D. Has a stop codon far downstream of an AUG
______ mutations alter the amino acids coded by the
downstream codons.
A. Frameshift
B. Missense
C. Nonsense
D. Point
E. Silent
A. Frameshift
______ mutations prematurely terminate the
polypeptide chain.
A. Frameshift
B. Missense
C. Nonsense
D. Point
C. Nonsense
Progeny from DD x Dd will have ____ of the progeny
showing recessive trait.
A. 0 %
B. 25%
C. 50%
D. 75%
E. 100%
A. 0 %
Principle of segregation states that the two _____ will
segregate into two gametes.
A. Proteins
B. Phenotypes
C. Dominance
D. Alleles
E. Genes
D. Alleles
Which of the following statements about mRNA
processing in eukaryotes is incorrect.
A. A guanosine is added as a 5’ cap.
B. A string of adenosine is added at the 3’ end.
C. The entire mRNA sequence codes for amino
acids.
D. All the introns are removed.
E. A 5’ UTR sequence may regulate translation.
C. The entire mRNA sequence codes for amino
Which of the following is not correct about RNA?
A. RNA is found inside ribosomes
B. RNA can base pair with DNA
C. RNA can function as a catalytic molecule
D. RNA is the hereditary material in some
archaea
E. RNA may have been the first self-replicating
molecule
D. RNA is the hereditary material in some
archaea
Principle of independent assortment states that the
_____ will be inherited independently.
A. Two alleles for a given gene
B. Two alleles for different genes
C. Two genes on different chromosomes
D. Two genes on the same chromosome
C. Two genes on different chromosomes
In a test cross an individual with a _____ phenotype
will be crossed with an individual with _______
phenotype.
A. Dominant; hybrid
B. Dominant; recessive
C. Recessive; dominant
D. Hybrid; dominant
E. Hybrid; recessive
B. Dominant; recessive
This pedigree chart suggests
that the disease is ________. (both mom and dad show the disease)
A. Autosomal dominant
B. Autosomal recessive
C. X-linked dominant
D. X-linked recessive
E. None of the above
B. Autosomal recessive
This pedigree chart suggests that the disease is
________. (mom shows dad doesn’t)
A. Autosomal dominant
B. Autosomal recessive
C. X-linked dominant
D. X-linked recessive
E. None of the above
D. X-linked recessive
