1.ง่าย
What is the main role of carbohydrates in the human diet?
- ATo provide a quick source of energy
- BTo form antibodies
- CTo carry the body's genetic information
- DTo build muscle tissue
2.ง่าย
โครงสร้างใดพบในเซลล์พืชแต่ไม่พบในเซลล์สัตว์
- Aผนังเซลล์
- Bไรโบโซม
- Cไมโทคอนเดรีย
- Dเยื่อหุ้มเซลล์
3.ง่าย
What is a neuron?
- AA blood cell that carries oxygen around the body
- BA nerve cell that carries electrical signals
- CA muscle cell that contracts
- DA bone cell that stores calcium
4.ปานกลาง
Nerve cells release chemical messengers (neurotransmitters) stored in vesicles. By which process are they released?
- AOsmosis
- BPhagocytosis
- CEndocytosis
- DExocytosis
5.ปานกลาง
What happens in the lytic cycle of a virus?
- AThe host cell makes antibodies against the virus
- BThe viral DNA joins the host DNA and stays inactive for a long time
- CThe virus divides by binary fission outside the cell
- DThe virus makes many copies in the host cell, which then bursts
6.ปานกลาง
A study finds a positive correlation between hours of exercise and lung capacity. What does this mean?
- AAs exercise increases, lung capacity tends to increase
- BThere is no link between the two variables
- CAs exercise increases, lung capacity tends to decrease
- DExercise has been proven to cause higher lung capacity
7.ยาก
เซลล์กล้ามเนื้อใช้พลังงานมาก คาดว่าเซลล์เหล่านี้จะมีออร์แกเนลล์ใดจำนวนมาก
- Aแวคิวโอล
- Bไมโทคอนเดรีย
- Cไลโซโซม
- Dคลอโรพลาสต์
8.ยาก
A dihybrid cross gives offspring in a ratio of about 9 : 3 : 3 : 1. What does this suggest?
- AOne parent is AaBb and the other is homozygous aabb
- BBoth parents are heterozygous for two genes that assort independently
- CThe two genes are tightly linked on the same chromosome
- DBoth parents are homozygous dominant for both genes
เฉลย
- 1. A · To provide a quick source of energy
- 2. A · ผนังเซลล์
- 3. B · A nerve cell that carries electrical signals
- 4. D · Exocytosis
- 5. D · The virus makes many copies in the host cell, which then bursts
- 6. A · As exercise increases, lung capacity tends to increase
- 7. B · ไมโทคอนเดรีย
- 8. B · Both parents are heterozygous for two genes that assort independently
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