护理入学考试生物练习卷（附答案）

What does gel electrophoresis separate?

1. ADNA fragments by size
2. BCells by their shape
3. CBlood into plasma and cells
4. DChromosomes by their colour

What is the main job of the nucleolus?

1. AIt stores water and salts for the nucleus
2. BIt digests worn-out parts of the cell
3. CIt makes ribosomal RNA and builds ribosome parts
4. DIt releases energy from glucose for the nucleus

Which bonds hold the two strands of a DNA double helix together?

1. APeptide bonds between the sugars
2. BIonic bonds between the phosphates
3. CHydrogen bonds between the bases
4. DDisulfide bonds between the bases

剧烈运动时，肌肉细胞缺氧。它们改由葡萄糖产生什么？

1. A酒精和二氧化碳
2. B乳酸（乳酸盐）和少量 ATP
3. C糖原和水
4. D大量 ATP 和氧气

Clostridium tetani grows in deep puncture wounds but is killed by oxygen. How is this bacterium described?

1. AAn obligate aerobe
2. BA facultative anaerobe
3. CA photosynthetic bacterium
4. DAn obligate anaerobe

Which polymer is correctly matched with its monomer?

1. AGlycogen and fatty acid
2. BProtein and nucleotide
3. CDNA and amino acid
4. DStarch and glucose

A patient with type A blood is given type B red blood cells by mistake. What is the cause of the reaction that follows?

1. AAnti-B antibodies in the patient's plasma attack the donor cells
2. BThe donor's B antigens destroy the patient's white blood cells
3. CThe patient's A antigens dissolve the donor's haemoglobin
4. DAnti-A antibodies on the donor cells attack the patient's plasma

A green plant is kept in a sealed jar in complete darkness for a day. What happens to the carbon dioxide level in the jar?

1. AIt stays the same, because plants do not respire
2. BIt falls, because plants take in more CO₂ when they respire in the dark
3. CIt falls, because the plant keeps photosynthesising
4. DIt rises, because the plant respires but cannot photosynthesise