Biology

A cell contains multiple nuclei with identical genetic information. This cell most likely formed by going through

(A) multiple rounds of mitosis, but no cytokinesis
(B) multiple rounds of the M phase, but no rounds of the S phase
(C) multiple rounds of cytokinesis, but no rounds of mitosis
(D) multiple rounds of the cell cycle, but no rounds of mitosis
(E) multiple rounds of the S phase, but no other phases of the cell cycle
Biology

A plant cell is placed in a hypotonic solution. As a result, the cell will

(A) lyse
(B) swell but remain intact
(C) shrivel
(D) remain unchanged
(E) take up solutes
Biology

Which of these cell structures contains one or more membranes?

(I.) Ribosome
(II.) Plasma membrane
(III.) Endoplasmic curriculum
(IV.) Golgi body

 

(A) II only
(B) IV only
(C) I and II
(D) I, II, and III
(E) II, III, and IV
Biology

Cyanobacteria are photosynthetic prokaryotes. Which organelles do cyanobacteria cells contain?

(I.) Chloroplasts
(II.) Nucleus
(III.) Ribosomes

 

(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
Biology

In the graph above, the time when the number of living bacteria is increasing at the greatest rate occurs

(A) during the first 2 hours
(B) between the 2nd and the 4th hour
(C) between the 4th and the 6th hour
(D) between the 6th and the 10th hour
(E) between the 11th and the 13th hour
Biology

A cell normally contains 54 chromosomes. During which phases of mitosis does the cell contain 108 chromosomes?

(I.) Anaphase
(II.) Metaphase
(III.) Prophase
(IV.) Telophase

 

(A) I and IV
(B) II and III
(C) II and IV
(D) I, II, and III
(E) I, II, and IV
Biology

How can a water molecule BEST be described?

(I.) It is nonpolar.
(II.) It has an equal electron distribution.
(III.) It is able to form hydrogen bonds.

 

(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
Biology

Which of these labels matches the structure of the partial RNA strand shown?

(A) I. phosphate; II. ribose; III. nitrogen base
(B) I. phosphate; II. nitrogen base; III. ribose
(C) I. nitrogen base; II. phosphate; III. ribose
(D) I. ribose; II. nitrogen base; III. phosphate
(E) I. ribose; II. phosphate; III. nitrogen base
Biology

In a breeding experiment using gray and white mice of unknown
genotypes, the following results were obtained.

If two gray progeny of cross IV mate with each other, what is the probability that any one individual offspring will be gray?

(A) 100%
(B) 75%
(C) 50%
(D) 25%
(E) 0
Biology

ATP is produced during which of the following processes?

(I) Photosynthesis
(II) Aerobic respiration
(III) Fermentation

 

(A) I only
(B) II only
(C) I and III only
(D) II and III only
(E) I, II, and III