HL Topic A2.1 Origin of cells - 无忧得胜-网上国际课程 (5edu.win)

1#

1. Why are fatty acids f-5*v ut,diuf or phospholipids important in the formation of cells and their compon ,-udut *5vfifents?

A. They are soluble.

B. They allow compartmentalisation of cells and organelles.

C. They only allow compartmentalisation of the nucleus.

D. They form cell walls.

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2#

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2. What is the acronym of the organism from whicheev k1mklz 5,5rx,(j d Homo sapiens is believed to have origev(51mzlr e, 5j,xkdkinally evolved?

A. LUCY

B. LUCA

C. HOMO

D. HELA

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3#

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3. Which of the following describes the condition3*iut + ijf0+d cccdb/s on early, pre-biotic Earth?

A. B. C. D.

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4#

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4. Viruses are said to be non-living.List two reasons that vi a u7bs3sbd ct9ao*3(vi;xa, mppk:y0ruses cannot be considered as livpp:os,tm;vck sax0d(339 abi7au* yb ing organisms.

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5#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

5. Explain why RNA, rather than DNA,kqmasoqss3 ,: ,s* j9i likely to be the first genetic material in living org*sa ,m3qjss,sq9kio:anisms.

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6#

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6. The Miller-Urey experiment produced organic molecules in an atmosphere th+:p2u qv9xjq iat, in 1952, was thought to have been like the atmosphere on earth prior to the evolution of life. In which way was the experiment’s model atmosphere different from today’s scientific underi:uj9v xq qp2+standing of the atmosphere at the origin of life on earth?

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7#

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7. Explain why the conditions on Earw/fyra5s ni1y4c;:xg th today make the spontaneous formation of organic carbon compounds less likely compared to the conditions on Earth at the time of tgfxrcin: a51ys y; /4whe origin of life.

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8#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

8. List the essential features pzrmlm38zic /+;w .z-z:akl,,nj ocz that the first cells must have possessed to be able to live and evolve into the liconz3l:mj, /p+czz.zkwi8rm,l ;-za fe forms that followed.

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