Biology for nursing entrance exams worksheet with answers

What is a zygote?

1. AA haploid cell made by meiosis
2. BAn unfertilised egg cell
3. CA body cell that has just completed its first round of mitosis
4. DThe diploid cell formed when a sperm fertilises an egg

What is the main job of the large central vacuole in a plant cell?

1. AIt assembles proteins from amino acids
2. BIt copies DNA before the cell divides
3. CIt captures light energy for photosynthesis
4. DIt stores water and keeps the cell firm

What is the R group of an amino acid?

1. AThe carboxyl group at one end
2. BThe side chain that differs between amino acids
3. CThe peptide bond between two amino acids
4. DThe amino group that is shared by all amino acids

What is the function of the pores in the nuclear envelope?

1. AThey make ribosomal RNA for the cell
2. BThey let molecules such as mRNA pass in and out
3. CThey attach the nucleus to the cell membrane
4. DThey let chromosomes leave the nucleus to be copied

What happens during telophase of mitosis?

1. AA nuclear envelope forms around each set of chromosomes
2. BThe sister chromatids are pulled apart
3. CThe DNA is copied for the next division
4. DThe chromosomes line up across the middle of the cell

A patient's blood type is B positive. What does this mean?

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

A food sample turns purple with biuret reagent but stays yellow-brown with iodine solution. What does the sample contain?

1. AProtein but no starch
2. BStarch but no protein
3. CBoth protein and starch
4. DFat but no protein

The number of bacteria in a sample rises from 200 to 500. What is the percentage increase?

1. A150%
2. B300%
3. C60%
4. D250%