Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 1, Problem 23RQ
Summary Introduction
To review:
The roles of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Introduction:
DNA and RNA molecules are
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Sequence changes in DNA are called ______________.
A base change that has no discernible effect is called a____________________ mutation.
Noncoding DNA sequences are called __________________.
Chapter 1 Solutions
Biochemistry: The Molecular Basis of Life
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- Enzymes isolated from bacteria that cut DNA at specificsequences are called ____________________.arrow_forwardQuestion 45 When TRNAS and rRNAs have bases that H-bonds with other bases far apart from each other, the RNA molecules assume its secondary and tertiary structure. A) True B) Falsearrow_forwardQuestion 1. Enzymes, proteins and deoxyribonucleic acid (DNA) macromolecules. Enzymes are not only speed up the reaction, but also are necessary for DNA repreduction. are important biological a) Compare the process of protein synthesis between eukaryote mRNA and viral RNA b) With the aid of a diagram, draw an adapter molecule that recognizes the codons of mRNA and explain its functions in DNA translation.arrow_forward
- If Adenine was added where Guanine should have been added, this would be an example of a ___________________ mutation.arrow_forwardExpressed sequences of DNA are called ________________.arrow_forwardQUESTION NO. 1 Patients with the rare genetic disease xeroderma pigmentosum (XP) are very sensitive to light and are highly susceptible to skin cancers. The study of such patients has enhanced our knowledge of DNA repair because XP is caused by defective DNA repair nucleotide excision repair. (A variant, XP-V, is deficient in postreplication repair.) In nucleotide excision repair A. removal of the damaged bases occurs on only one strand of the DNA. B. only thymine dimers generated by UV light can be removed . C. the excision nuclease is an exonuclease. D. a single multifunctional enzyme carries out the repair process. E. only the damaged nucleotides are removed. QUESTION NO.2 Homologous recombination: A. occurs only between two segments from the same DNA molecule. B. requires that a specific DNA sequence be present. C. requires one of the duplexes undergoing recombination be nicked in both strands. D. involves a…arrow_forward
- The eukaryotic mRNA is protected from degradation by a 3′ _____________.arrow_forwardQuestion 49 The Sanger method of DNA sequencing follows the principle of complementarity just like in the replication process. A) True B) Falsearrow_forwardThe stacking of bases in DNA is an example of _____________ interactions.arrow_forward
- _____________ are the linear sequences of nucleotides in an organism’s genetic information.arrow_forwardQuestion 6 The helical turns of the DNA does not only provide spaces for binding with regulatory proteins but they cause the molecule to resemble a spiral staircase. A) True B) Falsearrow_forwardWhen nitrogenous bases in single-stranded polynucleotides are incorporated into doublestranded molecules, base pair formation results in altered UV light absorption. This is called the _____________ effectarrow_forward
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