Question

91) Which of these statements is correct?

A) When bacteria conjugate, they mutually exchange genetic material.

B) Bacteria genetic material is confined within vesicles known as plasmids.

C) Archaea sexually reproduce but bacteria do not.

D) Bacteria sexually reproduce but archaea do not.

E) Prokaryotes divide by binary fission, without mitosis or meiosis.

92) A fish that has been salt-cured subsequently develops a reddish color. You suspect that the fish has been contaminated by the extreme halophile. Which of these features of cells removed from the surface of the fish, if confirmed, would support your suspicion?

1. the presence of the same photosynthetic pigments found in cyanobacteria

2. the cell walls lack peptidoglycan

3. the cells have the same solute concentration as is found on the surface of the fish

4. a high concentration of organic solutes in the cytoplasm of the cells

A) 1

B) 1 and 2

C) 2 and 3

D) 1, 2, and 3

E) 2, 3, and 4

93) Which statement about bacterial cell walls is false?

A) Cell walls of bacteria are made of chitin

B) Cell walls prevent cells from bursting in hypotonic environments.

C) Bacterial cell walls differ in molecular composition from plant cell walls.

D) Bacterial cell walls absorb Gram’s stain.

E) Carbohydrates are part of bacteria cell walls.

94) Which prokaryote is most likely to be found both in sewage treatment plants and in the intestines of cattle?

A) Cyanobacteria

B) Methanogens

C) Thin cell wall bacteria

D) Bacteria with plasmids

E) Thick cell wall bacteria

95) Genetic variation in bacterial populations cannot result from

A) transduction.

B) meiosis.

C) conjugation

D) mutation.

E) transformation

96) Which of the following, when taken up by the cell, binds to the repressor so that the repressor no longer binds to the operator?

A) ubiquitin

B) promoter

C) inducer

D) repressor

E) corepressor

98) During the process of spermatogenesis (making sperm by meiosis) a non-disjunction event that occurs during meiosis 2 makes

A) None of the four sperm cells aneuploid

B) All four sperm aneuploid

C) Two of the four sperm aneuploid

99) Nitrous oxide gas molecules (which are small and hydrophobic) moving directly through a cell's plasma membrane, from the high concentration side to the low concentration side, is an example of

A) filtration

B) diffusion.

C) active transport.

D) osmosis.

100) What is a cleavage furrow?

A) a ring of vesicles forming a cell plate

B) a groove in the plasma membrane of a dividing cell.

C) the separation of divided prokaryotes

D) the metaphase plate where chromosomes attach to the spindle

E) the space that is created between two chromatids during anaphase

Answer 1

Biology