Biology for nursing entrance exams worksheet with answers

Which four bases are found in DNA?

1. AAdenine, uracil, guanine and cytosine
2. BAdenine, thymine, guanine and cytosine
3. CAdenine, thymine, glucose and cytosine
4. DAlanine, thymine, glycine and cysteine

What is cell differentiation?

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

What is the correct order of the phases of mitosis?

1. AMetaphase, prophase, anaphase, telophase
2. BProphase, anaphase, metaphase, telophase
3. CTelophase, anaphase, metaphase, prophase
4. DProphase, metaphase, anaphase, telophase

Why do plants wilt when the soil around their roots becomes very salty?

1. ASalt blocks sunlight from reaching the leaves
2. BSalt makes the root cells swell and burst
3. CThe roots take in too much water
4. DWater leaves the root cells by osmosis

Why can DNA profiling (fingerprinting) identify individual people?

1. ADNA in blood differs from DNA in skin
2. BEach person's genes code for different amino acids
3. CEvery person has a different number of chromosomes in their cells
4. DRepeated non-coding DNA regions vary in length between people

What do starch, glycogen and cellulose have in common?

1. AThey are proteins made of amino acids
2. BThey are polysaccharides made of glucose units
3. CThey are lipids that store energy
4. DThey are nucleic acids that store hereditary information

A linear DNA molecule is fully cut by a restriction enzyme, giving fragments of 500, 300 and 200 base pairs. How long was the original molecule?

1. A1500 base pairs
2. B300 base pairs
3. C500 base pairs
4. D1000 base pairs

An mRNA reads AUG-UUU-GGC-UAA. How many amino acids are in the protein made from it?

1. A4
2. B12
3. C2
4. D3