Biology for nursing entrance exams worksheet with answers

Which codon signals the start of translation in most genes?

1. AUAA
2. BUGA
3. CUAG
4. DAUG

What are stomata?

1. AGreen structures in the leaf that store starch
2. BSmall pores in leaves that allow gas exchange
3. CHairs on roots that absorb minerals
4. DTubes that carry water up the stem

What does a lysosome do?

1. AIt stores the cell's genetic information
2. BIt makes proteins from amino acids
3. CIt captures light energy for the cell
4. DIt digests waste and worn-out parts

Which is the correct way to write the scientific name of the gut bacterium?

1. AEscherichia coli
2. BEscherichia Coli
3. Ccoli Escherichia
4. DEscherichia Coli

What do starch, glycogen and cellulose have in common?

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

What does Mendel's law of segregation state?

1. ADominant alleles are more common in a population than recessive ones
2. BThe two alleles of a gene separate so each gamete gets only one
3. CEach gamete receives both alleles of every gene
4. DGenes on different chromosomes are always inherited together

HIV infects and destroys helper T cells. Why do people with untreated advanced HIV get infections that healthy people rarely get?

1. AHelper T cells make the antibiotics that the body needs to fight infection
2. BHIV kills the normal flora of the skin and gut
3. CThe virus turns harmless microbes into pathogens
4. DTheir immune response is too weak to control normally harmless microbes

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. BNone of them
3. CMan 3
4. DMan 2