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

All of the following are population characteristics EXCEPT

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

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 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

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

Which of these BEST describes the part of the molecule shown?

(A) It is hydrophilic.
(B) It forms the outer layer of the plasma membrane.
(C) It is composed of phosphate atoms.
(D) It contains nonpolar covalent bonds.
(E) It is capable of hydrogen bonding.
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

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

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