Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 16.3, Problem 2R
Summary Introduction
To review:
The effect of inactivation of protease (enzyme, which cuts the HIV protein) by the drugs on the HIV’s (human immunodeficiency virus) reproductive cycle.
Introduction:
The HIV usually infects the host cell by integrating its deoxyribonucleic acid or DNA (made by the reverse transcription of its RNA (ribonucleic acid) template followed by its replication) into the host cell. After integration, the viral DNA transcribes and then translates to produce viral proteins that are processed by protease enzymes.
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Chapter 16 Solutions
Life: The Science of Biology
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- During the lysogengiv cycle, the virus integrates its dna into the host cell? true or falsearrow_forwardPrions “replicate” by _____. A) replicating their RNA genome within the cytoplasm B) converting normally-folded versions of the protein into misfolded version C) inserting their genome into the host cells chromosome where it will continue to divide indefinitely D) using reverse transcriptase to copy their RNA genome into a complementary copy of DNAarrow_forwardDescribe why the attachment step in a viral reproductive cycle isusually specific for one or just a few cell types.arrow_forward
- Explain the role of HIV protease during the process of HIV maturation.arrow_forwardWhich stage of the HIV Reproductive Cycle would be most directly blocked if reverse transcriptase was unable to work? Integration Assembly Release Attachment Entryarrow_forwardWhat are the advantages and disadvantages to bacteriophages of the lytic and lysogenic reproductive strategies?arrow_forward
- Cleavage furrow formed during cytokinesis is found in? A-both in animal and plants B- neither in animal nor in plant cells C- plant cells D- animal cellsarrow_forwardCompare and contrast the roles of fully spliced, incompletelyspliced, and unspliced HIV RNA. Which type is needed in theearly stages of HIV proliferation, and which is needed in laterstages?arrow_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_forward
- Many simple eukaryotes reproduce by asexual reproduction, using only mitosis. Assuming the environment is stable and the organism is well adapted to its environment, why is this a better form of reproduction for these organisms?arrow_forwardWhat is the function of a virion?arrow_forwardMost viral infections, including the common cold, chickenpox, mononucleosis and Ebola, are untreatable. Few antiviral drugs exist, and those in use may cause severe side effects to the patient. Why are viral infections so difficult to treat? Why do you think antiviral drugs cause severe side effects? Are there steps in viral reproduction that new antiviral medications could target?arrow_forward
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