Unity and Diversity A.5 Viruses - 无忧得胜-网上国际课程 (5edu.win)

1#

Which is characteristic of both prokaryotes a xynw1 mya32x-nd viruses?

I. Contain genetic code
II. Rely on host cell for metabolism
III. Surrounded by cell wall

A. I only

B. I and II

C. II and III

D. I, II and III

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Viruses, compared to living organibmeyjso.-+m dd (x 4p(sms, are very small. Which other characteristic listed below distinguishes viruses from uni-e(ydo(.jmpd +m sxb4 cellular living organisms?

A. Contain genetic material

B. Contain cytoplasm

C. Lack enzymes

D. Genetic material is surrounded by a capsid

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Bacteriophages and coronaviruses are both viruses affecting living organisms oxg( ax:+ jgmz40 zrnq6ep2l3. Which structures are present in bothm l3z n(g4p zr2a6oqegx:0 +jx bacteriophages and coronaviruses?
I. cytoplasm
II. capsid
III. genetic material

A. I only

B. I and II only

C. II and III only

D. I, II and III

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the rows below shows the correct charac*w9jcsm-3e z vx)v ba.teristics of viruses, prokaryotes and eukaryotes?.v9e zvw)xbcmaj 3-s*

A. Virus is Genome is DNA or RNA

rokaryote is Genome is DNA only;Eukaryote is Genome is DNA only

B. Virus is Genome is Rely on host cell for nutrition

rokaryote is Rely on host cell for nutrition;Eukaryote is Does not rely on host cell for nutrition

C. Virus is Genome is Synthesises ATP for energy supply

rokaryote is Synthesises ATP for energy supply ;Eukaryote is Genome is Synthesises ATP for energy supply

D. Virus is Genome is Capsid present

rokaryote is Capsid present;Eukaryote is Capsid present

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the following componcr+fb14mf/ ectq z3s4ents of some viruses are not present in both the bacteriophage and coronavirus?/f1sr t+be3 44q cfczm

A. Genetic information surrounded by a capsid

B. RNA genome

C. Enzymes for replication

D. Structures for attachment to a host cell

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6#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

The image below shows a virus which reproduces using the lytic or lysogeg-t -/d4o bgi sxypka+m2c9l6nic cycle. bp-/dklx+ 62omat-cg4s9i y g

1.State two structural features common to all viruses.

2.1.Identify the name of this virus.

2.2.Label the capsid on the image.

3.Compare and contrast the lytic and lysogenic cycles.

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7#

填空题 ( 1.0 分) 切至整卷模式搜藏此题

The image below shows the zr/3m w2qvg6ahuman immunodeficiency virus (HIV).

1.Explain the function of structure X.

2.1.Identify structure Y. Y is .

2.2.Identify structure Z. Z is .

3.State the host of this virus.

4.Describe the metabolic functions of reverse transcriptase.

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Some bacteriophages i 0fz/ceykd t01nfect host bacteria using the lytic cycle or the lysogenic cycle. e0f0zy dc /kt1Which process is characteristic of the lysogenic cycle but not the lytic cycle?

A. Phage DNA is injected into the host cell.

B. The phage inserts DNA into host DNA, forming a prophage.

C. Host bacterium is killed by cell lysis.

D. Phage proteins bind to receptors on the host bacterium cell.

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which is not a factor in the rapid evolution of the f;fe1i qy(mp54 p2bj whuman immunodeficiency viruswe q;i pf(45b 2mpjy1f?

A. Genetic recombination

B. High mutation rate

C. Slow replication rate

D. Genetic diversity of host population

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The origin of viruses z6b j 6zyooj;3is an area of active research and exploration. Which statement is not evidence that viruses;6oyz63zjjo b have origins in other organisms?

A. Similarities between genome sequence in viral and cellular genes.

B. Coevolution of viruses and host.

C. Retroviral enzymes such as reverse transcriptase convert RNA to DNA.

D. Rate of mutation is rapid in viruses.

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11#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

1.Outline the varied forms of gene6)0h ptkge1q )xq;g boh eq+(utic material found in viruses.

2.Discuss the evidence supporting that the diversity of viruses exists as a result of convergent evolution.

3.Compare the structure of the coronavirus with the human immunodeficiency virus, HIV.

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A diagram of HIV is shown below. Which struct3vw89,kk.xf,ym k3pzgif0 hvp +bjk9ure is composed of glycoproteins?

A. B. C. D.

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13#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

1.Outline the methods of HIV transmission and its e k9oq,2v mlp7.sy9atl*q 7lmiffects on the immune system. ayi 2ml sl7.9 p*ov t97k,mlqq

2.Discuss the need for international cooperation to fight contagious diseases such as Ebola.

3.Antibiotics are an essential tool of modern medicine. Outline the strengths and limitations of antibiotics.

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