BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Textbook Question
Chapter 8, Problem 8SA
a. DNA polymerase | c. primers |
b. |
d. all are required |
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Each time double-stranded (ds) DNA is replicated, the resulting copies of DNA include:
A.
One parent (original) strand and one daughter (new) strand
B.
Either two parent (original) strands or two daughter (new) strands
C.
Four parent strands
D.
Four daughter strands
The statement “DNA replicates by a semiconservative mechanism” means that (a) only one DNA strand is copied (b) first one DNA strand is copied and then the other strand is copied (c) the two strands of a double helix have identical base sequences (d) some portions of a single DNA strand are old and other portions are newly synthesized (e) each double helix consists of one old and one newly synthesized strand
f an error is made during replication that is not caught by DNA polymerase, the most likely is that _____.
a.
DNA ligase will repair the mistake before a mutation occurs
b.
only the daughter strand will be mutated
c.
both strands of DNA will be mutated
d.
DNA replication will stall indefinitely
e.
a mutation that causes cancer will occur
Chapter 8 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 8 - Which is not a nucleotide base in DNA? a. adenine...Ch. 8 - What are the base-pairing rules for DNA? a. A-G,...Ch. 8 - Similarities in ___________ are the basis of...Ch. 8 - One species DNA differs from others in its...Ch. 8 - In eukaryotic chromosomes, DNA wraps around...Ch. 8 - The chromosome number ________ . a. refers to a...Ch. 8 - Prob. 7SACh. 8 - DNA replication requires ________ . a. DNA...Ch. 8 - Energy that drives the attachment of a nucleotide...Ch. 8 - When DNA replication begins, _______ . a. the two...
Ch. 8 - The phrase 5to3 refers to the _________ . a....Ch. 8 - After DNA replication, a eukaryotic chromosome...Ch. 8 - Prob. 13SACh. 8 - _________ is an example of reproductive cloning....Ch. 8 - Match the terms appropriately. ___ nucleotide ___...Ch. 8 - Determine the complementary strand of DNA that...Ch. 8 - Woolly mammoths have been extinct for about 4,000...Ch. 8 - Xeroderma pigmentosum is an inherited disorder...
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- The phrase 5to3 refers to the _________ . a. timing of DNA replication b. directionality of DNA synthesis c. number of phosphate groupsarrow_forwardChose one of the options from A,B,C,D After replication,_________. a one new DNA double helix consists of two old strands and the other new DNA double helix consists of two new strands b each new DNA double helix consists of two new strands c each new DNA double helix consists of two old strands d each new DNA double helix consists of one old strand and one new strandarrow_forwardWhich of the following statements is false about DNA replication? A) Each lagging strand of DNA is started by an RNA primer. B) DNA polymerase joins nucleotides in the 5' to 3' direction only. C) The leading strand of DNA is made continuously. D) More than one replication fork is present. E) A replication bubble opens in one direction only.arrow_forward
- DNA polymerases ____. a. add new nucleotides to a strand b. repair DNA c. assemble new strands in both direction d. seal gaps in the sugar-phosphate backbone e. catalyze carbon bondingarrow_forwardThe replication of chromosomes by eukaryotes occurs in a relatively short period of time because ? a. The eukaryotes have more amount of DNA for replication b. The eukaryotic replication machinery is 1000 times faster than prokaryotes c. Each chromosome contains multiple replicons di ba ito? Same eto d. Eukaryotic DNA is always DNA strandedarrow_forwardNucleotide excision repair A. recognizes and repairs thymine dimers and other damaged bases in DNA B. corrects errors in nucleotide excision C. recognizes and removes mismatched bases after DNA synthesis is completed D. removes nucleotides that are incorrectly incorporated during DNA synthesisarrow_forward
- The elongation of leading strand during DNA synthesis a. progresses away from the replication fork. b. occurs in the 3'-5' direction c. does not require a template strand d. depends on the action of DNA polymerasearrow_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_forwardDNA replication is said to be semiconservative becausea. each new DNA molecule contains one new strand and one old one.b. every other new DNA molecule contains two old strands.c. each new DNA strand contains two new strands.d. every other new DNA molecule contains one new strand and one old one.arrow_forward
- Without the action of DNA ligase, cells would not be ableto complete their replication. What is the function of DNAligase?(a) Unzips the DNA double helix(b) Stabilizes single-stranded DNA(c) Binds DNA sequences together to generate acontinuous strand(d) Proofreads the replication process(e) Creates an RNA copy of the DNAarrow_forwardDNA strands are anti-parallel and DNA polymerase can only synthesize DNA in a 5' to 3' direction. How does the enzyme synthesize both strands at the same time? A. The leading strand is sythesised in Okazaki fragments B. The lagging strand is synthesised in short Okazaki fragments. C. Only one strand is replicated. D. There are more than one DNA polymerase involved.arrow_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_forward
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