Chapter 10 Flashcards
Which of the following people conducted the experiments that demonstrated that DNA is the genetic material of bacteriophages?
A) Hershey and Chase
B) Franklin
C) Pauling
D) Watson and Crick
E) Wilkins
A, Hershey and Chase
The process of making a copy of DNA is called
Replication
Which of the following enzymes catalyzes the elongation of a new DNA strand?
A) Single-stranded binding protein
B) RNA polymerase
C) Helicase
D) DNA polymerase
E) Ligase
D, DNA polymerase
DNA bases include all of the following except:
A) Thymine
B) Adenine
C) Guanine
D) Uracil
E) Cytosine
D, Uracul
In complementary base pairing of the DNA molecule, adenine always combines with
thymine
Which type of RNA forms the individual subunits of ribosomes?
rRNA
A nucleotide contains
a sugar, a phosphate, and a nitrogenous base
When one DNA molecule is copied (replicated) to make two DNA molecules, the new DNA contains
50% of the parent DNA
Which of the following is NOT true about mRNA?
A) It forms a double-stranded helix
B) It is found in the cytoplasm
C) It contains adenine, guanine, uracil, cytosine
D) It is single-stranded
E) It contains the sugar ribose
A, It forms a double-stranded helix
In transcription, DNA serves as a template for the synthesis of
RNA
Every three bases in DNA (a triplet) code for a single
amino acid
During the S period of interphase, what enzyme is responsible for copying a cell’s DNA?
DNA polymerase
A frameshift mutation
A) replaces one amino acid with another
B) joins two different proteins
C) introduces a section of amino acids not normally found
D) removes part of the protein
C, introduces a section of amino acids not normally found
True or False? A mutation always causes a mutant phenotype
false
What disease is caused by a defect in the protein hemoglobin?
Sickle cell anemia
