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

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

Organisms that convert nitrogen-containing organic molecules into nitrates

(A) Decomposers (e.g., bacteria)
(B) Producers (e.g., grasses)
(C) Primary consumers (e.g., mice)
(D) Secondary consumers (e.g., snakes)
(E) Tertiary consumers (e.g., hawks)
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

Which answer choice matches the functions listed below to the correct RNA types?

(I.) Interprets a codon as an amino acid
(II.) Binds to a gene transcript
(III.) Contains information for assembling a protein

 

(A) I. mRNA; II. rRNA; III. tRNA
(B) I. mRNA; II. tRNA; III. rRNA
(C) I. rRNA; II. mRNA; III. tRNA
(D) I. tRNA; II. mRNA; III. rRNA
(E) I. tRNA; II. rRNA; III. mRNA
Biology

All of the following are population characteristics EXCEPT

(A) number of individuals
(B) phenotype
(C) sex ratio
(D) age distribution
(E) death rate
Biology

Pollination involves a transfer of pollen from

(A) 4 to 1
(B) 4 to 2
(C) 4 to 5
(D) 5 to 4
(E) 5 to 9
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

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