Molecular Genetics Quiz
Preview:
STRUCTURE: Nucleotides monomers are made up of a sugar, a phosphate, and a:
A. nitrogenous base
B. nucleic acid
C. cholesterol
D. fatty acid
Meselsohn and Stahl’s experiment showed that…
A. DNA is the hereditary material
B. one gene leads to one protein
C. DNA replication is semiconservative
D. the nucleus contains DNA
A virus consisting of a single strand of RNA, which is reverse transcribed into complementary DNA, is referred to as a ________.
A. bacteriophage
B. retrovirus
C. prion
D. virulent phage
What mutation has occurred here?
T-G-A-C-C-A
T-G-A-G-C-A
A. Substitution
B. Deletion
C. Insertion
D. Frameshift
In gel electrophoresis ….
A. 15N is needed to weigh down the DNA samples
B. DNA molecules move towards the negative pole
C. larger molecules travel faster
D. smaller DNA fragments travel faster
Which of the following processes do normal proto-oncogenes typically exhibit?
A. They normally suppress tumor growth.
B. They enhance tumor growth.
C. They stimulate normal cell growth and division.
D. They are underexpressed in cancer cells.
A mutation leading to an early ‘stop’ codon is a …
A. frameshift mutation
B. silent mutation
C. missense mutation
D. nonsense mutation
Which of the following facts did Hershey and Chase make use of in trying to determine whether DNA or protein is the genetic material?
A. DNA contains sulfur, whereas protein does not.
B. DNA contains purines, whereas protein includes pyrimidines.
C. DNA contains phosphorus, whereas protein does not.
D. DNA contains nitrogen, whereas protein does not.
STRUCTURE: What Nitrogenous Base does RNA contain that DNA does not?
A. Thymine
B. Uracil
C. Adenine
D. Love
Humans have 23 pairs of chromosomes, and chimps have 24 pairs of chromosomes. What is the most likely explanation for these differences in human and chimp genomes?
A. At some point in evolution, human and chimp ancestors reproduced with each other.
B. In the evolution of chimps, new adaptations resulted from additional chromosomal material.
C. The common ancestor of humans and chimps had 24 pairs of chromosomes. During human evolution, two human chromosomes fused end to end.
D. Errors in mitosis resulted in an additional pair of chromosomes in chimps.
A codon is to mRNA as an anti-codon is to …
A. DNA
B. an amino acid
C. rRNA
D. tRNA
ATTTGAGCC- Original
ATTGAGCC – Mutated
The example above is an example of a
A. Insertion- Frameshift
B. Deletion- Substitution
C. Deletion -Frameshift
D. All of the above
Translation occurs in the:
A. office
B. cytoplasm
C. nucleus
D. cell membrane
The two strands in a DNA molecule are held together by …
A. hydrogen bonds
B. phosphodiester bonds
C. covalent bonds
D. ionic bonds
Which of the following is not a post-transcriptional modification of mRNA?
A. addition of poly-A tail
B. addition of 5′ cap
C. removal of introns
D. removal of exons