When does spontaneous mutation occur? A. a DNA base is an unstable tautomeric form as the replication fork arrives and a mismatched base is inserted B. thymine temporarily becomes uracil C. the sugars and phosphates in the DNA double helix exchange places D. a person smokes cigarettes or is exposed to a teratogen

When does spontaneous mutation occur? A. a DNA base is an unstable tautomeric form as the replication fork arrives and a mismatched base is inserted B. thymine temporarily becomes uracil C. the sugars and phosphates in the DNA double helix exchange places D. a person smokes cigarettes or is exposed to a teratogen

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter8: Dna Structure And Function

Section: Chapter Questions

Problem 9SA: Energy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from...

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Energy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from ________. a. the nucleotide b. DNA polymerase c. phosphate-group transfers from ATP
What is the role of DNA polymerase in DNA replication? O A. DNA polymerase replicates tRNA, mRNA and rRNA B. DNA polymerase adds A-U-G-C as compliments to the original DNA strand to make an identical copy. O C. DNA polymerase "unzips" the DNA D. DNA polymerase adds complimentary free nucleotides to the original strand to make and identical copy. Submit Clear form Never submit passwords through Google Forms. This form was created inside of East Baton Rouge Parish Schools. Report Abuse Google Forms
Why are mutations more likely to occur in repeated DNA sequences? a. These bases are unstable b. bases in the strand can form base pairs, generating loops that interfere with replication and repair enzymes. c. The repeats hold onto the replication enzymes, causing base mismatches d. the repeats attract and bind to mutagens, increasing the mutation rate
What is the effect of ionizing radiation on DNA? a. faster replication b. the formation of nucleotide dimers c. kinks in the DNA molecule d. breaks in the DNA molecule e. base pair mismatching
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 replication
What is DNA polymerase? a.An enzyme that carries out DNA replication b.Short, single strand of DNA that base-pairs with a specific DNA sequence c.An enzyme that corrects mutations that arise during the replication of DNA d.An enzyme that seals any gaps that remain between bases of replicating strands of DNA
What is the major role of DNA polymerase in the DNA replication? a. Attached RNA primers to initiate the addition of complementary nucleotide sequence at the 5’ to 3’direction b. Adds up new complementary nucleotide sequence at the 3’ to 5’ direction of the DNA template. c. Unwinds the double helix by breaking the bonds at the 3’ to 5’ polymerization activity. d.It transiently cuts each strand to prevent supercoil at the 5’ to 3’ polymerization activity complementary to the RNA strand
When two adjacent bases in the same strand of DNA dimerize (form a covalent bond between them), what happens to the DNA? a. the original strand of DNA now contains a new DNA sequence b. the original strand of DNA is prevented from opening during replication, so this section of DNA will not be replicated c. the original strand of DNA is methylated, which causes the bases to mismatch d. the original strand of DNA is kinked, which prevents DNA polymerase from working properly e. the original strand of DNA is unaffected, so no additional mutations arise
What is the correct sequence action of proteins during the process of DNA replication? A. DNA polymerase, helicase, primase, ligase, SSB B. helicase, SSB, primase, ligase, DNA polymerase C. ligase, helicase, SSB, primase, DNA polymerase D. helicase, SSB, primase, DNA polymerase, ligase
A. Give five important features of the DNA molecule? B. How does the DNA structure reflect its functions?
Why is cigarette smoke harmful to DNA? O a. Nicotine in smoke reacts with cell cycle proteins, leading to DNA damage and cancer O b. Chemical components of cigarette smoke cause breaks in the DNA strands, which may be incorrectly rejoined O c. A component of cigarette smoke can bind to G nucleotides, disrupting the helix. O d. Smoke induces adjacent thymine nucleotides to bind to each other, creating thymine dimers
Which dna strand will be synthesized continuously during dna replication? a.The strand that is synthesized as Okazki Fragments b.the strand which is synthesized in the opposite direction compared to the direction of DNA unwinding? c.the strand which is sythesized in the same direction as the same direction of DNA unwinding? d.The m-RNA like strand e. The non-template strand