1.Dễ
What are restriction enzymes?
- AEnzymes that digest fats in the intestine
- BEnzymes that cut DNA at specific base sequences
- CEnzymes that copy RNA into DNA
- DEnzymes that join amino acids into proteins
2.Dễ
Who first worked out the basic rules of inheritance by breeding pea plants?
- ARobert Hooke
- BCharles Darwin
- CGregor Mendel
- DLouis Pasteur
3.Dễ
What is cell differentiation?
- AThe process by which a cell divides into two
- BThe process by which cells die on purpose
- CThe process by which cells become specialised
- DThe process by which DNA is copied
4.Trung bình
Salivary amylase begins the digestion of which nutrient in the mouth?
- AFat
- BCellulose
- CStarch
- DProtein
5.Trung bình
What happens in the Calvin cycle of photosynthesis?
- AGlucose is broken down to release energy
- BCO₂ is built into sugar using ATP and NADPH
- CLight is absorbed by chlorophyll
- DWater is split to release oxygen
6.Trung bình
Lactose (milk sugar) is a disaccharide. Which two monosaccharides is it made of?
- AFructose and galactose
- BGlucose and galactose
- CGlucose and fructose
- DGlucose and glucose
7.Khó
The wings of a bat and the wings of a butterfly are used for flying but have very different structures. What are they called, and what does this show?
- AHomologous structures, which were inherited from a shared ancestor
- BHomologous structures, which have the same bones inside
- CVestigial structures, which no longer have a function
- DAnalogous structures, which evolved separately for the same job
8.Khó
Bệnh ưa chảy máu (hemophilia) là bệnh lặn liên kết X. Một người mẹ mang gene bệnh (XᴴXʰ) và một người bố không mắc bệnh (XᴴY) sinh một con trai. Xác suất người con này mắc bệnh ưa chảy máu là bao nhiêu?
- A1
- B0
- C1/4
- D1/2
Đáp án
- 1. B · Enzymes that cut DNA at specific base sequences
- 2. C · Gregor Mendel
- 3. C · The process by which cells become specialised
- 4. C · Starch
- 5. B · CO₂ is built into sugar using ATP and NADPH
- 6. B · Glucose and galactose
- 7. D · Analogous structures, which evolved separately for the same job
- 8. D · 1/2
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