护理入学考试化学练习卷（附答案）

现代元素周期表中，元素是如何排列的？

1. A按中子数递增
2. B按原子序数递增
3. C按元素符号的字母顺序
4. D按发现的日期

DNA belongs to which group of biological molecules?

1. AProteins
2. BLipids
3. CNucleic acids
4. DCarbohydrates

Which three elements make up carbohydrates?

1. ACarbon, hydrogen and nitrogen
2. BHydrogen, nitrogen and phosphorus
3. CCarbon, hydrogen and oxygen
4. DCarbon, nitrogen and sulfur

A red blood cell is placed in a concentrated (hypertonic) salt solution. What happens?

1. AWater leaves the cell, which shrinks
2. BThe cell stays the same size and shape
3. CWater enters the cell, which swells and may burst
4. DSalt leaves the cell, which swells

Which type of radiation can be stopped by a sheet of paper?

1. AX-rays
2. BGamma rays
3. CAlpha particles
4. DBeta particles (fast electrons)

Which property stays the same whether you have a small sample or a large sample of a pure substance?

1. AVolume
2. BTotal heat content
3. CMass
4. DDensity

What is a triglyceride made of?

1. AThree glucose molecules joined together
2. BOne glycerol molecule joined to three fatty acids
3. CThree amino acids joined by peptide bonds
4. DOne fatty acid joined to three glycerol molecules

A nurse wipes a patient's arm with an alcohol swab and the patient says the skin feels cold. What explains this?

1. AThe alcohol blocks the skin's nerve endings for warmth
2. BThe alcohol is stored at a much lower temperature than the room
3. CThe alcohol reacts with the skin in an endothermic chemical reaction
4. DThe alcohol absorbs heat from the skin as it evaporates