护理入学考试生物练习卷（附答案）

What is the job of the capsule found around some bacteria?

1. AIt holds the bacterium's main chromosome
2. BIt is used to swim through liquids
3. CIt protects the cell, for example from white blood cells
4. DIt helps the bacterium make energy by photosynthesis

What is the correct order of levels of organisation, from smallest to largest?

1. AOrgan, tissue, cell, organ system, organism
2. BTissue, cell, organ, organism, organ system
3. CCell, tissue, organ, organ system, organism
4. DCell, organ, tissue, organism, organ system

Which organelle makes lipids and helps break down drugs and toxins in liver cells?

1. ARough endoplasmic reticulum
2. BNucleolus
3. CCentriole
4. DSmooth endoplasmic reticulum

Why can an electron microscope show more detail than a light microscope?

1. AElectrons are brighter than light
2. BElectrons have a much shorter wavelength than light
3. CElectron microscopes use living cells only
4. DElectron microscopes use stronger glass lenses

Why does ice float on liquid water?

1. AIce is denser than liquid water
2. BIce molecules are lighter than liquid water molecules
3. CIce contains more air than liquid water
4. DHydrogen bonds hold ice in an open, less dense structure

血型为 AB 的人，红细胞上同时有 A 和 B 抗原。这是哪种遗传方式？

1. A伴性遗传
2. B不完全显性
3. C共显性
4. DA 对 B 完全显性

A mutation changes one amino acid in an enzyme. In which location is the change most likely to stop the enzyme from working?

1. AIn the gene's stop codon
2. BIn a section that is removed after the protein is made
3. CIn the active site
4. DOn the outer surface, far from the active site

A linear DNA molecule is fully cut by a restriction enzyme, giving fragments of 500, 300 and 200 base pairs. How long was the original molecule?

1. A1000 base pairs
2. B1500 base pairs
3. C300 base pairs
4. D500 base pairs