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Unit 4 Review
1. On which of the following rules is Genetics based?
a. The information flow is DNA to protein.
b. DNA replicates to form two identical molecules.
c. DNA is transcribed into mRNA.
d. mRNA is translated into protein.
e. All answers are correct.
2. Which of the following is a nucleotide found in DNA?
a. deoxyribose + phosphate group + uracil
b. deoxyribose + nitrogenous base + thymine
c. ribose + phosphate group + guanine
d. deoxyribose + nitrogenous base + uracil
e. deoxyribose + phosphate group + cytosine
3. If the sequence of one strand of a DNA molecule is
5’ ATGGCAT 3’, the sequence of the complimentary strand is:
a. 5’ TACCGTA 3’
b. 5’ ATGGCAT 3’
c. 3’ TACCGTA 5’
d. 3’ UACCGUA 5’
e. 3’ ATGGCAT 5’
4. DNA replication takes place during:
a. interphase.
b. transcription.
c. translation.
d. mitosis
e. anaphase
5. In analyzing the base composition of a DNA sample, a student
loses the information on pyrimidine content. The purine
content is A=27%, and G=23%. Using Chargaff’s Rule, the
pyrimidine content would be:
a. G=27%, A=23%
b. U=27%, C=23%
c. T=27%, C=23%
d. C=27%, T=23%
e. C=27%, U=23%
6. Transcription is the process in which:
a. RNA is synthesized from DNA.
b. RNA is synthesized from protein.
c. protein is synthesized from DNA.
d. DNA is synthesized from protein.
e. DNA is replicated.
7. mRNA is transcribed from:
a. both DNA sense and antisense strands.
b. the DNA sense strand.
c. the DNA antisense strand.
d. tRNA codons.
e. neither DNA sense or antisense strands.
8. The DNA sequence ATGCGTTA is transcribed into an RNA
strand with the sequence:
a. UAACGCAU
b. UACGCAAU
c. TACGCAAT
d. AUGCGAAU
e. TUCGCUUT
9. What is not true about the genetic code?
a. It is triplet.
b. It is the same for humans and bacteria.
c. It is overlapping.
d. Different codes can make the same amino acids.
e. It is universal.
10. The process of making proteins on the ribosome based on
instructions from mRNA is called:
a. transcription.
b. ribosynthesis.
c. replication.
Answers
1. E
2. E
3. C
4. A
5. C
6. A
7. C
8. B
9. C
10. E
d. transformation.
e. translation.