Biology: The Unity and Diversity of Life (Looseleaf)
15th Edition
ISBN: 9781337408417
Author: STARR
Publisher: CENGAGE L
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Textbook Question
Chapter 20, Problem 2SQ
The capsid of a virion consists of ___ .
- a. DNA
- b. RNA
- c. protein
- d. lipids
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The capsid is composed of protein subunits calleda. spikes
b. protomers
c. virions
d. capsomers
Viral structure can best be described as a ___.
A. tiny cell surrounded by a cell wall
B. tail sheath surrounded by tail fibers
C. clump of DNA or RNA surrounded by a protein coat
D. capsid surrounded by a protein coat
Sometimes Ab interferes with the attachment site on virions so they can't attach to a host cell. This process is_________
a. aggregation
b. inactivation
c. activation
Chapter 20 Solutions
Biology: The Unity and Diversity of Life (Looseleaf)
Ch. 20 - Bacteriophage-Inspired Antibiotics Although...Ch. 20 - Bacteriophage-Inspired Antibiotics Although...Ch. 20 - Bacteriophage-Inspired Antibiotics Although...Ch. 20 - The genome of ___ can be either RNA or DNA. a. a...Ch. 20 - The capsid of a virion consists of ___ . a. DNA b....Ch. 20 - Bacteriophages kill their host quickly by ______ ....Ch. 20 - The genetic material of HIV (a retrovirus) is...Ch. 20 - Prob. 5SQCh. 20 - Prob. 6SQCh. 20 - Prob. 7SQ
Ch. 20 - Bacteria that serve as decomposers are ___ . a....Ch. 20 - Prob. 9SQCh. 20 - Formation of a(n) ___ allows some soil bacteria to...Ch. 20 - _____ in the stomach of a cow release methane. a....Ch. 20 - A plasmid is a circle of ___ . a. RNA b. DNA c....Ch. 20 - Prob. 13SQCh. 20 - Prob. 14SQCh. 20 - Prob. 15SQCh. 20 - Prob. 1CTCh. 20 - Adenoviruses that cause colds do not have a lipid...Ch. 20 - The antibiotic penicillin acts by interfering with...Ch. 20 - Raw red alga of the genus Porphyra is part of a...
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- A cell with a Barr body is______ . a. a bacterium c. from a female mammal b. a sex cell d. infected by the Barr virusarrow_forwardThe viral ________ play(s) a role in attaching a virion to the host cell. a. core b. capsid c. envelope d. both b and carrow_forwardSome______ enter and replicate inside human cells. a. apicomplexans c. trypanosomes b. water molds d. ciliatesarrow_forward
- In general, RNA viruses multiply in the cell __, and DNA viruses multiply in the cell __. a. nucleus, cytoplasm b. cytoplasm, nucleusc. vesicles, ribosomes d. endoplasmic reticulum, nucleoluarrow_forwardThe envelope of an animal virus is usually derived from the _____ of its host cell. a. cell wall c. capsule b. plasma membrane d. receptorsarrow_forwardMitosis and cytoplasmic division function in ______ a. asexual reproduction of unicellular eukaryotes b. Gamete formation in prokaryotes c. Growth and tissue repair in multi – cellular organisms. d. Both a and carrow_forward
- After mitosis a ___ forms in animal cells, but a ___ forms in plant cells. A. vesicle; vacuole B. vacuole; cell plate C. cell plate; cleavage furrow D. cleavage furrow; cell platearrow_forwardThe viral envelope is made up of _______. A. Lipids and Proteins B. Proteins C. Glycoproteins D. AOTA E. NOTAarrow_forwardMost viruses use their own virally encoded: a. DNA/RNA polymerase b. Endoplastmic reticulum c. Ribosomes d. Mitochondriaarrow_forward
- The viral ________ plays a role in attaching a virion to the host cell.a. coreb. capsidc. enveloped. both b and carrow_forwardb. Preceded by DNA replication c. Results in gamete production. d. Spindle apparatus guides chromoson e movement e. Process of nuclear division. 12. The identification of bacteria by serologic tests is based on the presence of specific antigens. Which of the following bacterial components is least likely to conta in useful antigens? a. Ribosomes b. Cell wall c. Capsule d. Flagella 13. Each of the following statements concerning the Gram stain is correct except. a. Escherichia coli stains pink because t has a thin peptidoglycan.layer b. Streptococcus pyogens stains blue because it has a thick peptidoglycar layer c Mycoplasma pneumoniae is not visible in the Gram's stain because it does not have a d. Mycobacterium tuberculosis stains blue because it has a thick lipid layer 14. An outbreak of sepsis caused by Staph loeoccus aureus has occurred in the newborn nursery. You are called upon to investigate. According to your knowledge of the normal flora, what is the most likely source of ne…arrow_forwardA bacteriophage can infect ________. a. the lungs b. viruses c. prions d. bacteriaarrow_forward
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