1.쉬움
Which kind of organism causes malaria?
- AA virus spread by coughing
- BA fungus that grows on skin
- CA protist carried by mosquitoes
- DA bacterium carried in water
2.쉬움
In science, what is an observation?
- AA conclusion drawn before any data are collected
- BA guess about why something happens
- CA rule that explains all known facts
- DInformation gathered with the senses or instruments
3.쉬움
What are the bacteria called that normally live on the skin and in the gut without causing disease?
- ANormal flora
- BPrions
- CPathogens
- DVectors
4.보통
Which of these is part of the body's innate (non-specific) defence?
- AT cells that recognise one virus
- BThe skin and stomach acid
- CMemory B cells from an earlier infection
- DAntibodies made after vaccination
5.보통
What is the job of the checkpoints in the cell cycle?
- ATo copy the DNA a second time before mitosis
- BTo stop the cycle if the DNA is damaged or the cell is not ready
- CTo join the two daughter cells back together
- DTo speed up division whenever the cell is short of nutrients or space
6.보통
Where does the Krebs (citric acid) cycle take place in a eukaryotic cell?
- AIn the nucleus
- BOn the rough endoplasmic reticulum
- CIn the cytoplasm
- DIn the mitochondrial matrix
7.어려움
At 100× total magnification, the field of view of a microscope is 2 mm wide. What is its width at 400×?
- A0.2 mm
- B2 mm
- C0.5 mm
- D8 mm
8.어려움
Which parent's gamete decides the biological sex of a human baby, and why?
- AThe mother's, because an egg carries either an X or a Y
- BBoth equally, because each gives one Y chromosome
- CThe mother's, because she gives two X chromosomes
- DThe father's, because a sperm carries either an X or a Y
정답표
- 1. C · A protist carried by mosquitoes
- 2. D · Information gathered with the senses or instruments
- 3. A · Normal flora
- 4. B · The skin and stomach acid
- 5. B · To stop the cycle if the DNA is damaged or the cell is not ready
- 6. D · In the mitochondrial matrix
- 7. C · 0.5 mm
- 8. D · The father's, because a sperm carries either an X or a Y
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