BIOLOGY:LIFE ON EARTH-W/ACCESS
11th Edition
ISBN: 9780134669076
Author: Audesirk
Publisher: PEARSON
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Textbook Question
Chapter 12, Problem 5FTB
The DNA double helix is unwound by an enzyme called_________. Daughter DNA strands are synthesized by the enzyme________. In eukaryotic cells, the daughter DNA strands are synthesized in pieces; these pieces are joined by the enzyme__________.
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Which of the following is part of the elongation step of DNA synthesis?a. pulling apart the two DNA strandsb. attaching complementary nucleotides to the template strandc. untwisting the DNA helixd. none of the above
The process whereby DNA molecules are cut and rejoined in new combinations is called _____________ .
DNA replication results in (a) two DNA molecules—one with two old strands, and one with two new strands. (b) two DNA molecules, each of which has two new strands. (c) two DNA molecules, each of which has one old strand and one new strand. (d) none of the above
Chapter 12 Solutions
BIOLOGY:LIFE ON EARTH-W/ACCESS
Ch. 12 - 1. If a parental DNA strand has the base sequence...Ch. 12 - 2. What happens at the conclusion of DNA...Ch. 12 - An insertion mutation occurs when a nucleotide is...Ch. 12 - The rungs of the DNA double helix consist of any...Ch. 12 - The “rungs” of the DNA double helix are held...Ch. 12 - 1. DNA consists of subunits called_________. Each...Ch. 12 - The subunits of DNA are assembled by linking...Ch. 12 - The “base pairing rule” in DNA is that adenine...Ch. 12 - 4. When DNA is replicated, two new DNA double...Ch. 12 - The DNA double helix is unwound by an enzyme...
Ch. 12 - 6. Sometimes mistakes are made during DNA...Ch. 12 - Describe the experimental evidence that DNA is the...Ch. 12 - 2. Draw the general structure of a nucleotide....Ch. 12 - Describe the structure of DNA. Where are the...Ch. 12 - How is information encoded in the DNA molecule?Ch. 12 - 5. Describe the process of DNA replication.
Ch. 12 - How do mutations occur? Describe the principal...Ch. 12 - 1. In an alternate universe, although proteins are...Ch. 12 - Prob. 2AC
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- DNA replication is called semi-conservative because ___ (all, all or none) of the two new strands of DNA is old DNA from the original DNA molecule and ___ (all, all or none) is new DNA.arrow_forwardThe enzyme known as ________ uses ________ and separates the DNA strands at the replication fork. a. helicase, ATP b. helicase, GTP c. gyrase, ATP d. gyrase, GTParrow_forwardwhat is the ONLY reason a cell would need to make copies of DNA?arrow_forward
- In the lagging strand, DNA is made in the direction _________ the replication fork and is made as __________. a. toward, one continuous strand b. away from, one continuous strand c. toward, Okazaki fragments d. away from, Okazaki fragmentsarrow_forwardDNA replication is considered semiconservative because the________ strand will remain as half of the ________ molecule.a. antisense, DNA b. template, final DNA c. sense, mRNA d. codon, anticodonarrow_forwardBecause the polymerization of nucleotides is an endergonic process, energy is required for it to occur. What does DNA polymerase use as its energy source? Group of answer choices ATP that is broken into ADP and P and released Energy from photons of light Entropy created from protein digestion Nucleotides incorporated into a growing chain provide their own energy in the form of trinucleotidesarrow_forward
- What is DNA polymerase? A. An enzyme that corrects mutations that arise during the replication of DNA B. An enzyme that seals any gaps that remain between bases of replicating strands of DNA C. Short, single strand of DNA that base-pairs with a specific DNA sequence D. An enzyme that carries out DNA replicationarrow_forwardDuring DNA replication, the helicase enzyme binds to DNA and Select one: a. prevents the DNA strands from rewinding back into the helical shape b. cuts the double stranded DNA into single strands c. provides the starting point where new nucleotides can be added d. adds new nucleotides to the template strandarrow_forwardEach new double helix will contain ___________ strand of DNA from the parent strand and ____________ strand of newly created DNA.arrow_forward
- When DNA replicates, each resulting DNA molecule retains half of the original DNA strand. Because of this, the process is described asarrow_forwardTo make a new DNA strand, which of the following is necessary? a. A template strand c. Heavy nitrogen b. Nucleotides d. Both a and barrow_forwardDNA replication is said to be semiconservative because a. one of the new molecules conserves both of the original DNA strands. b. the new DNA molecule contains two new DNA strands. c. both of the new molecules contain one new strand and one old strand. d. DNA polymerase conserves both of the old strands.arrow_forward
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