Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 7TYU
Why are proteins not considered to be a good candidate for the firstliving molecule?
a. Their catalytic capability is not sufficient for most biological reactions.
b. Their amino acid monomers were not likely present in the prebioticsoup.
c. They cannot serve as a template for replication.
d. They could not have
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Levene made which contribution to our understanding of DNA structure?
a. He determined that the nucleus contains DNA.
b. He determined that DNA contains four nitrogenous bases
c. He determined that DNA consists of nucleotides.
d. He determined that the nitrogenous bases of DNA are present in regular ratios
Which describes the role of primase during replication?
a. It catalyzes the formation of phosphodiester bonds using NTPs as substrates. \
b. It coordinates synthesis of the leading strand and the lagging strand.
c. It functions as a holoenzyme that polymerizes in the 3’→ 5’ direction.
d. It uses an exonuclease activity to remove incorrect nucleotides.
Prior to the action of DNA ligase, how many hydrogen bonds are holding these two DNA fragments together?
Chapter 3 Solutions
Biological Science (6th Edition)
Ch. 3 - 1. What two functional groups are bound to the...Ch. 3 - 2. What type of bond is directly involved in the...Ch. 3 - What type of information is used to direct...Ch. 3 - 4. What is an active site?
a. the location in an...Ch. 3 - Prob. 5TYUCh. 3 - Prob. 6TYUCh. 3 - 7. Why are proteins not considered to be a good...Ch. 3 - Prob. 8TYUCh. 3 - Prob. 9TYPSSCh. 3 - 10. Make a concept map (see BioSkills 12) that...
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- By one hypothesis, clay________. a. facilitated assembly of early polypeptides b. was present at hydrothermal vents c. provided energy for early metabolism d. served as an early genomearrow_forwardThe diagram to the right shows how tiles can be put together in different ways. How does this example relate to the role of DNA as the universal genetic material in organisms?arrow_forwardWhy was the cold ethanol added to the soap and salt mixture? A To digest the cell walls B To dissolve the RNA C To emulsify lipids and remove large cellular debris D To precipitate the DNA E To denature the cytoplasmic proteinsarrow_forward
- 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 DNAarrow_forwardWhat was the purpose of the sodium chloride in nucleic acid extraction? CHOOSE ALL ANSWERS THAT APPLY A Sodium chloride binds mostly to the proteins associated with the DNA. B Sodium ions bind to the phosphate groups in DNA. C Chloride ions bind to the phosphate groups in DNA. D Sodium chloride shields the DNA protecting it from degrading, E Sodium ions bind to the deoxyribose in the DNA.arrow_forwardWhat 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_forward
- If Avery, MacLeod, and McCarty had found that samples of heat-killed bacteria treated with RNase and DNase transformed bacteria, but that samples treated with protease did not, what conclusion would they have drawn? a. Protease carries out transformation. b. RNA and DNA are the genetic materials. c. Protein is the genetic material. d. RNase and DNAse are necessary for transformationarrow_forwardImagine that all six of the key players in the discovery of the structure of DNA had agreed to work together from the start. How do you think the processarrow_forwardWhich statement describes Linus Pauling's contribution to the understanding of DNA structure? a Having first discovered the spiral shape of proteins, Linus Pauling used x-ray technology to hypothesize that the DNA molecule consisted of two consistently spaced strands that formed a spiral shape. b Having originally studied proteins, Pauling proposed that DNA was a three-chained helix with a sugar-phosphate backbone at the center and bases sticking out from the backbone. c Linus Pauling conducted experiments to prove that DNA carried genetic information. d Linus Pauling studied DNA base pairing.arrow_forward
- How is DNA synthesis similar in the two types of organisms?arrow_forwardSuppose you had a method of cutting DNA at specific sequences of nucleotides. how many nucleotides long (on average) would such a sequence have to be in order to make just one cut in a bacterial genome of 3 × 106 nucleotide pairs?arrow_forwardWhat would happen if the DNA and RNA that are mixed together came from very different organisms, for example a worm and a pig?arrow_forward
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