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 9f b1 3dqec:bdand 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 liv 0gfvc c0osx -70fu vkh dvj1-9cz7o)uing organisms, are very small. Which other characteristic listed below distinv fvc7- z-doc)10vk 79xugou0sfchj 0guishes viruses from unicellular 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 boxwqim7 x8,9k: oy v/soth viruses affecting living organisms. Which structures are present in both bacteriophagesq:w y,/voox8sm7k ix9 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 88:pyuae *dj. /o( jabkw t:u*foipt+shows the correct characteristics of viruses, prokaryotes ofp uajdj* 8(kw/.it::yu *a8t oe+pband eukaryotes?

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 components of some viruses are not present in- *rxbg+/q+mxyvhb2 5ye r7 mi both the bacty gmmryx+v+b5bhe /*rxq-7i2 eriophage and coronavirus?

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 b +w izptrvfsh +o2,;0lysogenic cyclio2sw +rzv, pth0+;fbe.

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.

该题自我估分: (必填) (满分:1.0分)

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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 hum1+/9jx byj2jvbat-j .i tpgou q* .s.lan 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 infect host bacteria using the lyz647r (wd ocskp 9b t/vcn3eq,tic cycle or the lysogenic cycle. Whichq( 7wd4 pbc nzos 3,e9ctr6/vk 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 evo0 lw+ju .v7fl*yvh ov,lution of the human immunodeficiency virus7wl.*u 0yvhvl, fojv +?

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 is anapv6)6ndj /x k area of active research and exploration. Which statement is not evidenj 6an/kv)pdx 6ce that viruses 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 genetic material found i/bjntid)0j7xpl s/m4f(oc k p+2/ ep kn 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 structure is co; z lu4+ecgwg-qn b(h.mposed 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 itsss1h;nry2y +g 5 xh k2is6d.ro effects on the immune system. gndss 2hi1yryhr;+ x5kso 62.

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.

该题自我估分: (必填) (满分:1.0分)

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