The bacterial chromosome is A. usually Circular b. Found in a nucleoid c. found

Question

The bacterial chromosome is

A. usually Circular

b. Found in a nucleoid

c. found in a nucleus

d. both circular and found in nucleoid

e. Both circular and found in a nucleus.

2. A growth medium that favors the growth of some microorganisms but inhibit the growth of other microorganisms is a (. ). medium.

a. selective

b. differential

c. select and differential

d. neither selective nor differential

3. DNA strands can be separated at

a.37 degrees C

b.60

c.94

4.the codon AUG

a. is found in DNA

b. found in RNA

c. is also know as a Start codon

d. is also known as know as a Stop codon

e. Both B & C are correct

5. Which PCR step causes the denaturation of double stranded DNA

a. Add DNA Polymerase and nucleotides at 72 degrees C

b. Cool DNA between 50 c and 65 c

c. Add primers

d. Heat target DNA to 94 degrees C

e. Repeat the cycle of heating and cooling

6. Which of the following processes is involved in the "central dogma" of genetics

a. translation only

b. transcription only

c. DNA replication only

d. Transcription and translation

e. DNA replication translation and transcription

7. A housekeeping "gene is

a. Constitutively expressed

b. never expressed

c. positvely regulated

d. negatively regulated

e. All of the above

8. Which of the following mutagens causes mutations by creating thymine dimers?

a. nucleotide analogs

b. nitrous acid

c. ultraviolet light

d. benzopyrene

e. gamma rays

9. A gene that is only "turned on" when its product is needed is also called an (. ) gene.

a. inducible

b. repressible

c. restriction

d. operator

e. promoter

10. Most bacteria reproduce by

a. aerial hyphae

b. mitosis

c. binary fission

d. budding

Explanation / Answer

1. Option D is correct. The bacterial chromosome is both circular and found in the nucleoid.

2. Option a is correct. A growth medium that favors the growth of some microorganisms but inhibit the growth of other microorganisms is selective medium

3. Option C is correct. DNA strands can be separated at 94

4. Option E is correct. The codon AUG is the start codon found in the mRNA.

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