ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is cell differentiation?

1. AThe process by which a cell divides into two
2. BThe process by which cells become specialised
3. CThe process by which cells die on purpose
4. DThe process by which DNA is copied

In which stage of the cell cycle does a cell spend most of its time?

1. AProphase
2. BAnaphase
3. CMetaphase
4. DInterphase

What are the parts of a triglyceride (a fat molecule)?

1. AOne glycerol and three fatty acids
2. BTwo glycerols and one fatty acid
3. CThree glucose units and one phosphate
4. DOne amino acid and three fatty acids

Many vitamins act as coenzymes. What does this mean?

1. AThey are digested to release large amounts of energy
2. BThey help enzymes carry out their reactions
3. CThey replace enzymes that have been denatured
4. DThey are built into the cell membrane

How can bacteria pass antibiotic-resistance genes directly to other bacteria?

1. ABy conjugation, transferring plasmids through a pilus
2. BBy meiosis, forming gametes with new alleles
3. CBy mitosis, sharing copies of their chromosomes with neighbours
4. DBy osmosis, moving genes in water

Red-green colour blindness is X-linked recessive. A colour-blind woman (XᵇXᵇ) has children with a man with normal colour vision (XᴮY). What fraction of their sons is expected to be colour-blind?

1. AOne quarter
2. BOne half
3. CAll
4. DNone

A plant cell is placed in a strong salt solution. Its membrane and cytoplasm pull away from the cell wall. What is this called?

1. ALysis
2. BCrenation
3. CTurgor
4. DPlasmolysis

Five recovery times in days are 5, 6, 6, 7 and 30. Which value best describes a typical recovery time, and why?

1. AThe median of 6, because the outlier pulls the mean up
2. BThe maximum of 30, because it shows the worst case
3. CThe range of 25, because it shows the spread
4. DThe mean of 10,8, because it uses every value