Biology for nursing entrance exams worksheet with answers

Which sex chromosomes does a typical human male have?

1. AXY
2. BXX
3. CX only
4. DYY

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

1. ATwo glycerols and one fatty acid
2. BOne glycerol and three fatty acids
3. COne amino acid and three fatty acids
4. DThree glucose units and one phosphate

In an enzyme reaction, what is the substrate?

1. AThe substance that the enzyme acts on
2. BThe gene that codes for the enzyme
3. CThe part of the enzyme that changes shape
4. DThe product released at the end

Which structure is found in both prokaryotic and eukaryotic cells?

1. ARibosomes
2. BMitochondria
3. CA nucleus
4. DThe endoplasmic reticulum

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. CNone
4. DAll

Why do root hair cells have long, thin extensions?

1. ATo increase the surface area for absorbing water
2. BTo carry out photosynthesis underground
3. CTo store starch for the winter
4. DTo anchor the plant firmly against strong winds and rain

In a trial, 20% of patients improve on a new drug and 18% improve on a placebo. What is the best conclusion?

1. AThe drug works well, because 20% of patients improved
2. BThe drug is ten times better than the placebo
3. CThe drug adds little benefit beyond the placebo
4. DThe placebo was harmful to the patients

A single-celled microbe has a nucleus and a cell wall made of chitin, and it reproduces by budding. What is it most likely to be?

1. AA bacterium
2. BA yeast
3. CA virus
4. DAn amoeba