Робочий аркуш «Біологія для вступних іспитів на медсестринство» з відповідями

What are stomata?

1. AHairs on roots that absorb minerals
2. BGreen structures in the leaf that store starch
3. CTubes that carry water up the stem
4. DSmall pores in leaves that allow gas exchange

What is the active site of an enzyme?

1. AThe region where the substrate binds
2. BThe part of the cell where the enzyme is made
3. CThe gene that codes for the enzyme
4. DThe product formed by the reaction

Which of these hormones is a steroid?

1. AGlucagon
2. BGrowth hormone
3. CInsulin
4. DTestosterone

What causes cohesion between water molecules?

1. AHydrogen bonds between neighbouring molecules
2. BIonic bonds between oxygen atoms
3. CCovalent bonds between neighbouring molecules
4. DMagnetic forces between hydrogen atoms

What does the enzyme lipase break down?

1. AStarch into sugars
2. BProteins into amino acids and peptides
3. CDNA into nucleotides
4. DFats into fatty acids and glycerol

Which is an example of negative feedback?

1. AContractions growing stronger during labour
2. BBlood clotting speeding up once it starts
3. CSweating when body temperature rises
4. DA wound becoming more inflamed over time

A mutation changes one amino acid in an enzyme. In which location is the change most likely to stop the enzyme from working?

1. AIn a section that is removed after the protein is made
2. BOn the outer surface, far from the active site
3. CIn the gene's stop codon
4. DIn the active site

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. A1000 base pairs
2. B300 base pairs
3. C1500 base pairs
4. D500 base pairs