Concept explainers
Videos
Introduction: Capsid is a covering made up of small protein subunits called capsomeres. These capsomeres are arranged in a specific pattern over the virus. It provides protection to the virus.
Answer to Problem 1TY
Correct answer: Capsid is the protein coat that surrounds the genetic material of the virus. Hence, the correct answer is option c.
Explanation of Solution
Reason for correct answer:
Option c. is given as “capsid”.
The capsid is the protein structure arranged over the virus. It provides protection to the genetic material of the virus. Hence, the correct answer is option c.
Reasons for the incorrect answer:
Option a. is given as, “host”.
It is the organism which is invaded by a virus or a bacterium. For bacteriophage, the host organism is bacteria. Hence, option a. is incorrect.
Option b. is given as, “prion”.
A prion is a form of infectious protein molecule. They do not have
Option d. is given as, “viroid”.
A viroid is a small single-stranded infectious nucleic acid and does not possess any protein coat. Hence, option d. is incorrect.
Option e. is given as, “capsule”.
The capsule is the proteinaceous covering present on the surface of bacteria and not viruses. Hence, the option e. is incorrect.
Hence, the options a., b., d., and e. are incorrect.
Sometimes, the capsid present in viruses can also have an envelope. The envelope contains proteins for penetration and entry into the host. The capsid is made up of capsomeres and it protects the genetic material of the virus.
Want to see more full solutions like this?
Chapter 18 Solutions
BIOLOGY VOL.1 W/CONNECT PLUS ACCESS
- Which of the following is a property of life that viruses lack? A. The manufacture and use of complex carbon containing molecules B. The potential to grow and expand their populations C. Engages in self-sustaining biological processes such as homeostasis and metabolism D. The potential to pass hereditary material to offspringarrow_forwardWhich of these is true of prions?a. They are small RNA viruses.b. They replicate in the nucleus.c. They lack protein.d. They cause death of brain cells.arrow_forwardWhich of the following are activities that a virus particle (a virion) cannot accomplish by itself? Select all that apply. a) Extract energy from food molecules b) Synthesis of capsid proteins c) Generate ATP d) Binding to a host cell e) Replication of the viral genomearrow_forward
- Which statement is true? a. A virion contains DNA and RNA. b. Viruses are acellular. c. Viruses replicate outside of the cell. d. Most viruses are easily visualized with a light microscope.arrow_forwardThere is a big debate if viruses are alive or not. Either way, look at the list below and pick out the accurate statements. A. Can only reproduce/replicate in a living cell. B. They have a protein coat surrounding and protecting the nucleic acid. C. Viruses have either DNA OR RNA - not both D. They sometimes have an envelope.arrow_forwardWhich of the following does NOT inititiate DNA synthesis ? (correct answer e) a. a single-stranded DNA virus. b. a (-) single stranded RNA virus c. a (+) single stranded RNA virus d. a double-stranded DNA virus (Poxviridae) e. Both (-) and (+) single-stranded RNA virusesarrow_forward
- The nucleic acid of animal viruses enters the host cell througha. injection b. fusion c. endocytosis d. b and carrow_forwardWhich of the following is a reason that scientists do not classify viruses as living things? A. They must infect a host because they cannot reproduce on their own. B. They contain DNA, like all living organisms. C. The experience evolution through natural selection. D. They replicate themselves and reproducearrow_forwardViruses are not considered to be alive because: (choose all that apply) Virus Basics Viruses are not considered to be alive because: (choose all that apply) A. They do not grow B. They cannot reproduce on their own C. They are not made of cells D. They do not contain genetic material (such as DNA)arrow_forward
- At which stage of viral infection did these mutations most likely occur? a.) Attachment b.) Entry c.) Uncoating d.) Protein syntheis e.) Genome replicaton f.) Assembly g.) Exitarrow_forwardRegarding enveloped viruses, which of the following is true of the viral envelope? A. It has the same structure as a cell wall B. It is resistant to soaps/detergents C. It is composed of capsid proteins D. It is a phospholipid bilayer derived from a membrane of its host cell 42.arrow_forwardWhich of the following statements correctly describes viruses? Select one: A. They can reproduce by dividing. B. They cannot reproduce without a host cell. C. They have a genome similar to prokaryotic and eukaryotic cells. D. They can carry out their own metabolic activities.arrow_forward
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning