Question

1. Which of these is a genetic mutation that alters a base but does not change the

amino acid?

Select one:

a. frameshift

b. missense

c. nonsense

d. silent

2. What is the process that occurs when a recipient eukaryote cell accepts DNA

fragments indirectly from the surrounding environment?

Select one:

a. transfection

b. transduction

c. transformation

d. transferal

3. Which type of genetic transfer requires that donor and recipient cells come into

contact with each other?

Select one:

a. cloning

b. conjugation

c. transformation

d. transduction

4. In genetic engineering, the enzyme that is used to rejoin DNA phosphate-sugar

bonds that have previously been cut is a(n)

Select one:

a. endonuclease.

b. ligase.

c. polymerase.

d. transcriptase.

5. What type of toxin is secreted by a bacterial cell into infected tissues?

Select one:

a. nephrotoxin

b. endotoxin

c. hemotoxin

d. exotoxin

Answer 1

1.Silent mutation (D) is the genetic mutation that alters a base but does not change the amino acid.

2. Transformation (C) is the process that occurs when a recipient eukaryote cells accepts DNA fragments indirectly from the surrounding environment.

3.Conjugation (B) is the type of genetic transfer requires that donor and recipient cells come into contact with each other.

4. In genetic engineering, the enzyme that is used to rejoin DNA phosphate _sugar bonds that have previously been cut is Ligase (B)

5.Exotoxin (D) is the type of toxin is secreted by a bacterial cell into infected tissues.