Mid-term (Quiz)

Question 1

A(n) ________ is chemical that increases the rate of permanent changes to DNA.

Answer 1

Mutagen

Question 2

All of the DNA molecules that code for all of the physical traits of an organism are referred to as a(n) ______________.

Answer 2

Genotype

Question 3

Genetic expression involves 2 major phases; ______is the process where RNA is created from DNA,

Answer 3

Transcription

Question 4

while ______ Response is the process where proteins are created from RNA.

Answer 4

Translation

Question 5

A(n) ______ is a section of DNA that codes for one specific physical trait.

Answer 5

Gene

Question 6

Binary fission is an example of vertical gene transfer.

Answer 6

True

Question 7

A(n) ____________ is a section of DNA, within the control region, where a repressor can bind to prevent transcription.

Answer 7

Operator

Question 8

Which of the following molecules are able to catalyze transcription?

Answer 8

RNA polymerase

Question 9

RNA polymerase is an enzyme that catalyzes transcription.

Answer 9

True

Question 10

A permanent change in DNA sequence is referred to as a(n) ______ .

Answer 10

Mutation

Question 11

A chromosome is a supercoiled protein molecule.

Answer 11

False

Question 12

Gene not regulated and always ON

Answer 12

Constitutive gene

Question 13

Gene normally ON, but able to be inhibited

Answer 13

Repressible gene

Question 14

Gene normally OFF, but able to be activated

Answer 14

Inducible gene

Question 15

All genes necessary to synthesize a structural protein are referred to as a(n) ______ .

Answer 15

Operon

Question 16

Which of the following is NOT a component of all nucleotides?

Answer 16

Amino acid

Question 17

A molecule that inactivates a repressor and initiates transcription is referred to as an inducer.

Answer 17

True

Question 18

Transcription and translation can occur simultaneously in bacteria.

Answer 18

True

Question 19

Vertical gene transfer to offspring is referred to as ______ Response ,

Answer 19

Replication

Question 20

while horizontal gene transfer to the same generation is referred to as ______ Response .

Answer 20

Recombination

Question 21

Transfer of DNA indirectly between 2 cells via environment

Answer 21

Transformation

Question 22

Transfer of DNA directly between 2 cells via pili

Answer 22

Conjugation

Question 23

Transfer of DNA indirectly between 2 cells via virus

Answer 23

Transduction

Question 24

A structural gene is a region of DNA that regulates transcription.

Answer 24

False

Question 25

All mutations negatively affect an organism.

Answer 25

False