Biology for nursing entrance exams worksheet with answers

What is the resolution of a microscope?

1. AHow many times larger it makes the image of the specimen
2. BHow bright the image appears
3. CHow large the field of view is
4. DIts ability to show two close points as separate

What is the main structure of the cell membrane?

1. AA single sheet of starch molecules
2. BA rigid layer of cellulose fibres and lignin
3. CA phospholipid bilayer with embedded proteins
4. DA thick wall of peptidoglycan

Which type of microscope is needed to see a virus?

1. AA magnifying glass
2. BA dissecting microscope
3. CA light microscope
4. DAn electron microscope

What does it mean that a person's blood is Rh negative?

1. ATheir red cells lack the RhD antigen
2. BTheir red cells lack the A and B antigens
3. CTheir plasma has no antibodies at all
4. DTheir red cells carry extra RhD antigen

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

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

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. ANone
2. BOne half
3. CAll
4. DOne quarter

Bacteria in a closed flask grow quickly at first, but the population then stops increasing. What is the main reason?

1. AThe bacteria change into viruses after many divisions
2. BThe flask becomes too cold for growth
3. CNutrients run out and waste products build up
4. DThe bacteria stop dividing once they reach adult size

A child's DNA profile has bands A, B, C and D. The mother has bands A and C. Man 1 has bands B and D, man 2 has A and E, and man 3 has C and F. Which man could be the biological father?

1. AMan 1
2. BMan 2
3. CNone of them
4. DMan 3