Biology

An original cell replicates its DNA. The cell undergoes mitosis and cell division, and one of the daughter cells replicates its DNA. Which of these BEST describes the DNA of the second-generation daughter cells?

(A) One of the cells will contain DNA consisting of one strand from the original cell.
(B) One of the cells will contain DNA consisting of two strands from the original cell.
(C) Both of the cells will contain DNA consisting of one strand from the original cell.
(D) Both of the cells will contain DNA consisting of two strands from the original cell.
(E) Neither of the cells will contain DNA consisting of strands from the original cell.
Biology

A solute cannot move into a cell by crossing the phospholipid bilayer of the membrane. It can, however, enter through a membrane protein. The fact that solute molecules are entering the cell MOST LIKELY indicates that

(A) energy is being expended by the cell
(B) the solute is moving against its concentration gradient
(C) the solute molecules are hydrophilic
(D) the cell is in a hypotonic solution
(E) solute concentration is higher inside than outside the cell
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 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

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 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
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
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