11) Which one of the following statements CORRECTLY compares the : 1403036
11) Which one of the following statements CORRECTLY compares the effects of a mutation in a gamete to the effects of a mutation in a somatic cell?
A) Somatic cell mutations always cause cancer, whereas gamete mutations do not.
B) Gamete mutations are passed to the next generation, whereas somatic cell mutations are not.
C) Gamete mutations are typically deadly, whereas somatic cell mutations are not.
D) Somatic cell mutations are typically deadly, whereas gamete mutations are not.
E) Mutations in both types of cells usually result in cancer.
12) Mutations in human DNA rarely impair normal cell function because
A) repair of DNA prevents all mutations from ever causing damage to a cell
B) damaged cells commit "suicide" to prevent damage to the body
C) cells have one major repair enzyme that corrects the mutations quickly
D) multiple DNA repair enzymes usually quickly correct the mutations before any damage can occur
E) the cells attack dysfunctional gene products, averting damage to the cell
13) Which one of the following statements describes the process through which a primary RNA transcript becomes a functional mRNA?
A) Sections of the primary transcript called exons are removed, and the sections that remain are spliced together.
B) Sections of RNA called exons are added to the primary transcript.
C) A primary transcript needs no editing and is immediately ready to function as mRNA.
D) Noncoding sections of the primary transcript, called introns, are removed, and the remaining coding sections, called exons, are spliced together.
E) Random sections of the primary transcript called exons are replaced with sections called introns.
14) How many codons are in the following sequence of nucleotides: AAAUGCUCGUAA?
15) The processes of initiation, elongation, and termination that occur in the production of a protein are all associated with
A) DNA replication
B) processing of a fat in the endoplasmic reticulum
C) correction of a mutation
D) formation of an intact ribosome
16) A codon is
A) a type of DNA repair enzyme
B) a promoter that prevents the attachment of RNA polymerase
C) a sequence of three nitrogenous bases on mRNA that corresponds to an amino acid
D) the part of the ribosome to which mRNA attaches
E) a sequence of three nitrogenous bases on tRNA that corresponds to an amino acid
17) At which one of the following stages of the cell cycle does a chromosome develop into two sister chromatids?
A) mitotic phase
B) S phase
C) G1 phase
D) G2 phase
E) G0 phase
18) It is evident that translation occurs at ribosomes because they contain binding sites for
A) primary transcripts of mRNA
B) DNA repair enzymes
D) tRNA and mRNA
E) mitotic spindles
19) Which one of the following stages of mitosis is shown in the figure, and which stage comes next?
A) anaphase, telophase
B) telophase, anaphase
C) prophase, anaphase
D) metaphase, anaphase
E) metaphase, telophase
20) Chromosomes first become visible as two sister chromatids held together at the centromere during which one of the following phases?