1.쉬움
What is the main job of the cell wall in a plant cell?
- ATo support the cell and stop it from bursting
- BTo release energy from glucose
- CTo control which genes are switched on in the nucleus
- DTo make proteins for the cell
2.쉬움
What is true of a recessive allele?
- AIts trait shows whenever one copy is present
- BIt is always harmful to the organism
- CIt is found only on the X chromosome
- DIts trait shows only when two copies are present
3.쉬움
What does it mean that a cell membrane is selectively permeable?
- AIt lets no substance cross at all
- BIt lets every substance cross freely in both directions
- CIt lets some substances cross but not others
- DIt lets only water molecules cross
4.보통
In which phase of mitosis do the chromosomes condense and the nuclear envelope break down?
- AAnaphase
- BMetaphase
- CProphase
- DTelophase
5.보통
탈수 합성 반응에서는 어떤 일이 일어나나요?
- A세포가 말라서 죽는다
- B물 분자가 첨가되어 중합체가 분해된다
- C단위체 두 개가 결합하면서 물 분자가 하나 나온다
- D삼투에 의해 세포에서 물이 빠져나간다
6.보통
A person catches chickenpox once and does not usually become ill with it again. Why?
- AThe skin becomes thicker after the first infection
- BAntibodies from the first infection turn into new viruses
- CThe virus stays in the blood and kills new viruses
- DMemory cells give a faster, stronger response the next time
7.어려움
두 부모의 혈액형이 모두 O형입니다. 자녀가 가질 수 있는 혈액형은 무엇인가요?
- A네 가지 모두
- BO형만
- CA형 또는 O형
- DAB형만
8.어려움
Why do cells get far more ATP from glucose when oxygen is present than when it is absent?
- AWithout oxygen, glucose cannot enter the cell or be broken down at all
- BWithout oxygen the Krebs cycle runs faster but makes less ATP
- CWithout oxygen only glycolysis runs, giving a net of 2 ATP per glucose
- DOxygen itself is converted into ATP in the mitochondria
정답표
- 1. A · To support the cell and stop it from bursting
- 2. D · Its trait shows only when two copies are present
- 3. C · It lets some substances cross but not others
- 4. C · Prophase
- 5. C · 단위체 두 개가 결합하면서 물 분자가 하나 나온다
- 6. D · Memory cells give a faster, stronger response the next time
- 7. B · O형만
- 8. C · Without oxygen only glycolysis runs, giving a net of 2 ATP per glucose
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