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

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

If the gray female from cross IV were mated with the gray male from cross II, then which of the following would most likely be true?

(A) All of the offspring would be gray.
(B) All of the offspring would be white.
(C) Half of the offspring would be gray.
(D) One-quarter of the offspring would be gray.
(E) One-quarter of the offspring would be white.
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

The genetic code table shows the amino acids that correspond to mRNA codons. Each codon is read from 3′ (first nucleotide) to 5′ (third nucleotide). A DNA template strand is shown.

Which amino acid sequence will be assembled from the mRNA associated with this strand?

DNA template strand: 5′-GCG ACA TAC ACT-3′

(A) Ala-Cys-Met
(B) Arg-Cys-Met
(C) Ala-Thr-Tyr-Thr
(D) Ala-Thr-Tyr-Trp
(E) Arg-Thr-Tyr-Thr
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

What is the correct sequence of these events in the cell cycle?

(I) Nuclear membrane dissolves.
(II) Cell size increases.
(III) Two daughter cells form.
(IV) DNA replicates.

 

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