1.쉬움
What are restriction enzymes?
- AEnzymes that digest fats in the intestine
- BEnzymes that join amino acids into proteins
- CEnzymes that cut DNA at specific base sequences
- DEnzymes that copy RNA into DNA
2.쉬움
Which pigment absorbs light energy for photosynthesis?
- AChlorophyll
- BMelanin
- CHaemoglobin
- DKeratin
3.쉬움
In biology, what is a clone?
- AAn organism that carries genes from two different species
- BAn offspring of two different parents
- CA cell with an extra chromosome
- DA genetically identical copy of an organism, cell or gene
4.보통
Why can an electron microscope show more detail than a light microscope?
- AElectrons have a much shorter wavelength than light
- BElectron microscopes use stronger glass lenses
- CElectron microscopes use living cells only
- DElectrons are brighter than light
5.보통
DNA 주형 가닥이 T-A-C로 읽힙니다. 이에 대응하는 mRNA 코돈은 무엇인가요?
- AA-U-G
- BA-T-G
- CT-A-C
- DU-T-G
6.보통
DNA 가닥 A-T-G-C-C-A에 상보적인 염기 서열은 어느 것인가요?
- AT-A-C-G-G-T
- BA-T-G-C-C-A
- CG-C-A-T-T-G
- DU-A-C-G-G-U
7.어려움
A patient breathes very slowly, so carbon dioxide builds up in the blood. What happens to the blood pH, and why?
- AIt stays the same, because CO₂ does not dissolve in blood
- BIt rises, because CO₂ is a base
- CIt falls, because CO₂ forms carbonic acid in the blood
- DIt rises, because CO₂ removes hydrogen ions
8.어려움
Fertiliser washes from farmland into a lake. Algae grow rapidly, then die, and later many fish die. What is the main cause of the fish deaths?
- ABacteria decomposing the dead algae use up the oxygen
- BThe fish eat too many algae and become ill
- CThe fertiliser is directly poisonous to fish
- DThe algae release carbon dioxide that poisons fish
정답표
- 1. C · Enzymes that cut DNA at specific base sequences
- 2. A · Chlorophyll
- 3. D · A genetically identical copy of an organism, cell or gene
- 4. A · Electrons have a much shorter wavelength than light
- 5. A · A-U-G
- 6. A · T-A-C-G-G-T
- 7. C · It falls, because CO₂ forms carbonic acid in the blood
- 8. A · Bacteria decomposing the dead algae use up the oxygen
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