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Concept explainers
Introduction: A genome of an organism is the entire set of DNA that it possesses. The genome that is composed of genes consists of all the information to construct and sustain an organism. The genetic material present in the genes (DNA or RNA) is responsible to pass the hereditary information to the daughter cells. Cells can have either DNA or RNA as the genetic material. A virus can have either DNA or RNA as the genetic material.
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Answer to Problem 1SQ
Correct answer: DNA or RNA may be the genetic material of a virus.
Hence, the correct answer is option c.
Explanation of Solution
Reason for the correct answer:
Option c. is given as “a virus”. The virus is a tiny infectious agent that is alive only in the living cells and can replicate only using host replicating machinery. The virus can have both DNA and RNA as a genetic material.
Hence, the correct answer is option c.
Reasons for the incorrect answers:
Option a. is given as “a bacterium”.
Bacteria are the prokaryotes that carry either DNA as a genetic material. Bacteria lack the membrane-bound nucleus and contain free DNA or RNA in their cytoplasm. They do not contain RNA as a genetic material.
Hence, the correct answer is option a.
Option b. is given as “a viroid”.
This is incorrect. The viroids are the tiny infectious that consists of short RNA strand without a protein coat. They do not contain both DNA and RNA as genetic material.
Hence, option b. is incorrect.
Option d. is given as “an archaeon”.
Archaeon is the prokaryotes with a single-celled structure similar to bacteria. They contain DNA as their genetic material, not RNA.
Hence, option d. is incorrect.
Hence, the options a., b., and d. are incorrect.
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Chapter 20 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
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- Using information from the primary literature (several references have been provided as a starting point below) please answer the following question: Based on your review of the literature on rewilding, what are the major scientific pros and cons for rewilding? Please note that the focus of this assignment are the (biological) scientific issues associated with rewilding. As will be discussed in class, there are a number of non-scientific issues involved or implicated in rewilding, all ultimately affecting the public acceptability of rewilding. Although these issues are important – indeed, critical – in this assignment you should focus on the biological science issues and questions. Details: You must enumerate at least two pros and at least two cons. Your answer should be no more than 500 well-chosen words, excluding references. Think carefully about how best to organize and structure your answer. Aim for high information density: say a lot, but say it succinctly. Recall Nietzche’s…arrow_forwardNow draw a rough sketch of what the control data might look like if in addition to the specific binding, there was also a considerable amount of nonspecific binding (again using a normal dose/response curve) (do % total bound ligand vs concentration)arrow_forwardWhat are functions of cuboidal cells in the kidney? Select all that apply. Concentration of gases Dilution of chemicals Secretion of molecules Nutrition to tissues Support of tissues Absorption of moleculesarrow_forward
- question1 In plants, epithelial tissue is only found as the outermost cell layer and acts as a barrier. In humans, epithelial tissue is found inside the body as well as on the surface. What function(s) does/do epithelial tissue carry out in humans? Select all that apply. Waste storage Filtration Oxygen transport Protection Diffusion Osmosis Absorptionarrow_forwardWhat words best describes this organism? a. Unicellular/nonmotile Ob. unicellular/motile c. colonial/nonmotile d. colonial/motile e. multicelluar O f. siphonous g. none of thesearrow_forwardIdentify the phylum or class. a. Euglenophyta b. Dinoflagellata c. Bacillariophyceae d. Oomycetes e. Phaeophyceae O f. Myxomycota g. Xanthophyceae ○ h. Chrysophyceae i. Dictyosteliomycota O j. Rhodophyta Ok. Chlorophyceaens I. Charophyceaensarrow_forward
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