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________ can have a genome of either RNA or DNA.
| a. Bacteria | b. Eukaryotes | c. Viruses | d. Archaea |
Introduction:
Nucleic acids can be considered as the major macromolecules for the continuity of life processes. The two types of nucleic acids are DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). DNA is the genetic material in living organisms that is passed from one generation to another.
Answer to Problem 1SA
Correct answer:
Viruses can have a genome of either RNA or DNA. Hence, the correct answer is option c.
Explanation of Solution
Reason for correct answer:
Option c. is given as “Viruses.”
A virus is a noncellular infectious particle that replicates only inside a living cell. Their genome consists of RNA or DNA that may be single-stranded or double-stranded.
Reason for incorrect answer:
Option a. is given as, “Bacteria.”
Bacteria are single-celled and have a porous cell wall around their plasma membrane. A single circular double-stranded DNA is present in the cytoplasm. This indicates that bacteria contains DNA only. Hence, option a. is incorrect.
Option b. is given as, “Eukaryotes.”
Eukaryotic cell have multiple chromosomes made up of DNA and proteins. This indicates that eukaryotes have only DNA in their genome. Hence, option b. is incorrect.
Option d. is given as, “Archaea.”
Archaea are the prokaryotic organisms that are similar to bacteria in many respects. They have a single circular chromosome like bacteria. This indicates that archaea contains only DNA in their genome. Hence, option d. is incorrect.
Hence, the options a., b., and d. are incorrect.
The genome of virus consists of either RNA or DNA. Thus, the correct option is c.
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Chapter 19 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
- The first forms of life on Earth were thought to be_____. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaursarrow_forwardBoth archaea and eukaryotes have______ . a. peptidoglycan c. a nucleus b. histone proteins d. a capsidarrow_forwardCFCsa. produce chlorine gas. c. are carcinogens.b. cause global warming. d. bind to chromosomes.arrow_forward
- Viruses are composed of which type of genetic material inside of a protein shell? a. Not all viruses contain genetic material b. RNA c. DNA d. DNA or RNAarrow_forwardViruses consist of either DNA or RNA wrapped inside a protein coat. Are viruses considered alive? A. Yes, because they contain DNA. B. Yes, because they contain DNA and proteins. C. No, because they lack carbohydrates and lipids. D. No, because some viruses use RNA as the main genetic molecule.arrow_forwardIn the case of the Ebola outbreak in the Democratic Republic of the Congo (then called Zaire) in 1976, how did the virus first transmit to humans? A. A teacher ate a wild bat B. A teacher ate a wild antelope C. Scientists are still unsure D. A mosquito bit a teacherarrow_forward
- Choose the combination of answers that most accurately completes the statement.Viruses are not considered living things because a. they are not cells b. they cannot reproduce by themselves c. they lack metabolism d. All of these are correctarrow_forwardWhich statement best explains why the third domain, Archea, was added to the original two domains of Bacteria and Eukarya? A. scientist discovered that eukaryotes are unicellular B. scientist discovered that eukaryotes have cell walls C. scientists discovered that some prokaryotes have cell walls D. scientists discovered that some prokaryotes live in extreme environmentsarrow_forwardViruses are not considered living because they ________. a. are not made of cells b. lack cell nuclei c. do not contain DNA or RNA d. cannot reproducearrow_forward
- Which of the following refer/s to viruses? A. They are disease-causing. B. They contain DNA or RNA. C. They must have protection for their own genetic material. D. They are parasitic. A, B, C only A, B, C, D A, C, D B, C, Darrow_forwardWhich statement about the genomes of prokaryotes is not correct? A. Prokaryotic chromosomes are sometimes called plasmids B. Prokaryotic genomes are haploid throughout the life of the cell C. The prokaryotic chromosome is found the nucleoid region D. Prokaryotic genomes are composed of circular DNAarrow_forwardWhich of the following consist of prokaryotic cells? a. bacteria and fungi b. archaea and fungi c. protists and animals d. bacteria and archaeaarrow_forward
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College