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15 Cards in this Set

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1)The term gene expression refers to the
process by which genetic information flows from genes to proteins.
2)In a prokaryote, a group of genes with related functions, along with their associated control sequences, defines
an operon.
3)Proteins that bind to DNA and turn on operons by making it easier for RNA polymerase to bind to a promoter are called
activators.
4)Most differentiated cells retain
a complete set of their genes and retain the ability to express those genes under certain circumstances.
5)Which of the following processes occurs when a salamander regenerates a lost limb?
B) Certain cells in the limb dedifferentiate, divide, and then redifferentiate to form a new limb.
6)Enhancers are
C) the site on DNA to which activators bind.
7)Silencers are sites in DNA that
C) bind repressor proteins to inhibit the start of transcription.
8)The coding regions of a gene (the portions that are expressed as polypeptide sequences) are called
B) exons.
9)Which of the following permits a single gene to code for more than one polypeptide?
B) alternative RNA splicing
10)Which one of the following is not a mechanism used to regulate protein production?
D) DNA editing
11)When a T2 bacteriophage infects an E. coli cell, what part of the phage enters the bacterial cytoplasm?
C) only the DNA
12)The monomers of DNA and RNA are
C) nucleotides.
13)Which one of the following is false?
A) RNA USES THE SUGAR DEXTROSE.
B) RNA uses the nitrogenous base uracil.
C) RNA is a nucleic acid. D) One RNA molecule can include four different nucleotides in its structure.
E) RNA molecules have a sugar-phosphate backbone.
14)Which one of the following is false?
A) DNA uses the sugar deoxyribose.
B) DNA USES THE NITROGENOUS BASE URACIL.
C) DNA is a nucleic acid. D) One DNA molecule can include four different nucleotides in its structure.
E) DNA molecules have a sugar-phosphate backbone.
15)The shape of a DNA molecule is most like
C) a twisted rope ladder.