DNA And RNA
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- 1.What is one way that RNA differs from DNA?
- A.
RNA is a longer mollecule.
- B.
RNA contains a different kind of sugar.
- C.
RNA occurs only in the nucleus.
- D.
DNA contains only 3 nitrogenous bases.
- 2.Which one of the following is NOT a common characteristic of both RNA and DNA?
- A.
They are both nucleic acids.
- B.
Both contain C-G base pair sequences.
- C.
Both contain A-T base pair sequences.
- D.
Both can be found in the nucleus.
- 3.How many base pair sequences does it take to make a codon for an amino acid?
- A.
Two
- B.
Three
- C.
Four
- D.
Five
- 4.A DNA base sequence is A-T-T-C-C-G. What would be the corresponding mRNA base sequence?
- A.
U-A-A-G-G-C
- B.
T-A-A-G-G-C
- C.
A-T-T-C-C-G
- D.
U-T-T-C-C-G
- 5.Proteins are polypeptides made of a long chain of ...
- A.
Carbon molecules
- B.
Base pairs
- C.
Nucleotides
- D.
Amino acids
- 6.When one DNA makes a copy of itself in the nucleus, it is called ...
- A.
Transcription
- B.
Translation
- C.
Replication
- D.
Transconfiguration
- 7.Which type of RNA carries amino acids to the ribosomes?
- A.
RRNA
- B.
MRNA
- C.
TRNA
- D.
Ordinary RNA
- 8.A DNA nuceotide sequence that is 99 base pairs in length would code for how many amino acids?
- A.
33
- B.
22
- C.
99
- D.
3
- 9.What kind of mutation results in the substitution of one amino acid for another?
- A.
Frame shift
- B.
Chromosomal
- C.
Point
- D.
Deletion
- 10.Tobacco, UV radiation, asbestos, and X-rays can all alter the DNA structure and are examples of what?
- A.
Mutagens
- B.
Mutations
- C.
Nucleotides
- D.
Anticodons
- 11.Although most mutations are harmful, sometimes a beneficial mutation occurs that helps an organism do what?
- A.
Increase its amount of DNA
- B.
Live longer, happier lives
- C.
Be better adapted to its environment
- D.
Grow faster
- 12.Protein synthesis involves which two processes in which order?
- A.
Transcription - replication
- B.
Translation - transcription
- C.
Transcription - translation
- D.
Replication - translation
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