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Quiz
QUIZ
1. What is the main arrangement of the prokaryotic DNA?
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a. Circular within a nucleus b. Circular without a nucleus c. Linear within a nucleus d. Linear without a nucleus
2. How does the prokaryotic genome get compacted?
a. It is negatively supercoiled, against the grain of the double helix. b. It is positively supercoiled, with the grain of the double helix. c. It is wrapped around histone proteins throughout its length. d. It is wrapped around unique, glycoproteins throughout its length.
3. What sequence on an operon will selectively bind to RNA polymerase in order to set the operon up for activity?
a. Promotor b. Regulator c. Terminator d. Operator
4. Which part of a eukaryotic cell does not normally contain DNA?
a. Nucleus b. Nucleoid c. Chloroplast d. Mitochondria
5. Which hormone is least likely to bind to DNA and regulate gene expression?
a. Estrogen b. Testosterone c. Progesterone d. Luteinizing hormone
6. Where on the trp gene sequence or the trp operon does an inhibitory protein bind?
a. Operator b. Repressor c. Promotor d. Terminator
7. What is the major effect of histone acetylation in the eukaryotic nucleosome?
a. It decreases transcription of the DNA b. It increases the binding of DNA repressors c. It increases the binding activity of histone proteins to DNA d. It decreases the binding activity of histone proteins to DNA
8. What does not happen as part of genomic imprinting in the mammalian embryo?
a. The embryo fails to develop properly b. Some DNA segments are methylated c. The DNA is distinguished as being of maternal or paternal origin d. Some genes get expressed and some genes do not
9. What is the most common sequela of a gene mutation?
a. There is no effect on the cell b. A protein is missing or absent, resulting in disease c. The cell becomes cancerous d. The cell dies
10. What type of mutation is also referred to as a point mutation?
a. Addition of some bases to the gene b. Deletion of some bases in the gene c. Substitution of one base for another d. Deletion of the entire gene
