Microbiology: Principles and Explorations
10th Edition
ISBN: 9781119390114
Author: Black
Publisher: WILEY
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Chapter 8, Problem 1.2SC
DNA is not always the gemetic material. What are the exceptions?
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The final steps of DNA synthesis involve the removal and replacement of primers with DNA, and the formation of the final phosphodiester bonds of the backbone which join all the fragments into one unbroken strand of DNA.
True or false?
As a result of DNA replication two DNA molecules come into existence. Why is it not correct to assert that two “new” DNA molecules are created? What is the name given to the process concerning that fact?
"Unlike what happens in DNA replication, where both strands
are copied, only one of the two strands is transcribed into
MRNA. The DNA strand that contains the gene is sometimes
called the sense strand, or coding strand, and the DNA strand
that gets transcribed to give RNA is called the antisense strand,
or noncoding strand. Because the sense strand and the antisense
strand are complementary, and because the DNA antisense
strand and the newly formed RNA strand are also
complementary, the RNA molecule produced during
transcription is a copy of the DNA sense strand... The only
difference is that the RNA molecule has a U everywhere the
DNA sense strand has a T."
Consider the following segment of a DNA sense strand:
(5') CAA-ACT-ACG-GCG-TTG-CAG (3’)
Chapter 8 Solutions
Microbiology: Principles and Explorations
Ch. 8 - Compare and contrast chromosomes in prokaryotes...Ch. 8 - DNA is not always the gemetic material. What are...Ch. 8 - How could mutations give rise to new alleles of a...Ch. 8 - How does trandlation differ from transcription?Ch. 8 - Distinguish between leading and lagging strands.Ch. 8 - What do 5 and 3 refer to? How do they determine...Ch. 8 - Contrast the three kinds of RNA. Does DNA make all...Ch. 8 - What feeds back in feedback inhibition? What does...Ch. 8 - What is the inducer for the lac operon?Ch. 8 - Compare enzyme induction and enzyme repression.
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- All the following statements about DNA are true, EXCEPT: O DNA is a double-helix, consisting of a sugar-phosphate backbone. O DNA is made up on nucleotides, which consist of one sugar, one phosphate, and one base. O DNA consists of 4 bases - adenine, uracil, cytosine, and guanine. The two main functions of DNA are to replicate itself and to create proteins (by providing the template for protein synthesis). O The sugar in DNA is deoxyribose.arrow_forwardHow important and useful to the cell is the ability of the DNA to assume various forms? Why are these various forms necessary?arrow_forwardDNA has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. One aspect of DNA that allows it to accurately store genetic information is the base pairing from Chargaff's first rule of the four nucleotide bases. If the A content of a DNA molecule is 18%, what are the percentages of the remaining bases? T = G = C = % % %arrow_forward
- DNA Does replication occur in one direction or both directions along the parental (old) strand?arrow_forwardWhat is it about the structure of DNA that makes it stable (and allows it to be replicated so exactly)?arrow_forwardIf one DNA segment has the following base composition, 5'-CAGTTAGC-3', which of the following sequences is complementary? 5'-GCTAACTG-3' 5'-GTCAATCG-3' 5'-GCTAAGCT-3' 3'-GCTAACTG-5'arrow_forward
- Fill in the palindromic sequence of the given DNA strand containing six bases. 5' G A G T 3' Choose... Choose... Choose... Choose... Choosearrow_forwardDuring DNA replication, each new strand of DNA is synthesized from both ends at once. This statement is false. why is this false?arrow_forwardOne DNA strand of Chromosome #12 has the following nucleotide sequence: TAC/CGC/CCT/TGC/GTA/CTC/ACT. What nitrogenous bases would be found on "the other DNA strand lying along side of it and why?"arrow_forward
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