Biology Illinois Edition (Glencoe Science)
7th Edition
ISBN: 9780078759864
Author: Alton Biggs
Publisher: MCG
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Question
Chapter 18, Problem 21A
Summary Introduction
Introduction:
The viruses are the small pathogen having
Expert Solution & Answer
Answer to Problem 21A
Correct Answer:
Option (A) Genetic material and a capsid.
Explanation of Solution
Explanation/justification for the correct answer:
Option (A) genetic material and capsid. The viruses are made up of genetic material, which is either DNA or RNA, the genetic material of the virus is enclosed within a protein membrane called capsid.
Explanation for incorrect answer:
Option (B) a nucleus, genetic material and capsid. The nucleus is the characteristic of eukaryotic cells. Inside the nucleus the genetic material of the cell is enclosed. Hence, it is an incorrect answer.
Option (C) a nucleus, genetic material, ribosomes and capsid. The viruses lack a nucleus and ribosome, these are characteristic of a cell and virus is acellular. Hence, it is not correct.
Option (D) a nucleus, genetic material, ribosome, plasma membrane and capsid. The virus is acellular and plasma membrane is the outer covering of cells. It is absent in viruses. Hence, it is an incorrect answer.
Chapter 18 Solutions
Biology Illinois Edition (Glencoe Science)
Ch. 18 - Prob. 1ACh. 18 - Prob. 2ACh. 18 - Prob. 3ACh. 18 - Prob. 4ACh. 18 - Prob. 5ACh. 18 - Prob. 6ACh. 18 - Prob. 7ACh. 18 - Prob. 8ACh. 18 - Prob. 9ACh. 18 - Prob. 10A
Ch. 18 - Prob. 11ACh. 18 - Prob. 12ACh. 18 - Prob. 13ACh. 18 - Prob. 14ACh. 18 - Prob. 15ACh. 18 - Prob. 16ACh. 18 - Prob. 17ACh. 18 - Prob. 18ACh. 18 - Prob. 19ACh. 18 - Prob. 20ACh. 18 - Prob. 21ACh. 18 - Prob. 22ACh. 18 - Prob. 23ACh. 18 - Prob. 24ACh. 18 - Prob. 25ACh. 18 - Prob. 26ACh. 18 - Prob. 27ACh. 18 - Prob. 28ACh. 18 - Prob. 29ACh. 18 - Prob. 30ACh. 18 - Prob. 31ACh. 18 - Prob. 32ACh. 18 - Prob. 33ACh. 18 - Prob. 34ACh. 18 - Prob. 35ACh. 18 - Prob. 36ACh. 18 - Prob. 37ACh. 18 - Prob. 38ACh. 18 - Prob. 39ACh. 18 - Prob. 40ACh. 18 - Prob. 41ACh. 18 - Prob. 42ACh. 18 - Prob. 43ACh. 18 - Prob. 1STPCh. 18 - Prob. 2STPCh. 18 - Prob. 3STPCh. 18 - Prob. 4STPCh. 18 - Prob. 5STPCh. 18 - Prob. 6STPCh. 18 - Prob. 7STPCh. 18 - Prob. 8STPCh. 18 - Prob. 9STPCh. 18 - Prob. 10STPCh. 18 - Prob. 11STPCh. 18 - Prob. 12STPCh. 18 - Prob. 13STPCh. 18 - Prob. 14STPCh. 18 - Prob. 15STPCh. 18 - Prob. 16STPCh. 18 - Prob. 17STPCh. 18 - Prob. 18STPCh. 18 - Prob. 19STPCh. 18 - Prob. 20STP
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