Biology for nursing entrance exams worksheet with answers

Which unit is most often used to give the size of a cell?

1. ALitres (L)
2. BMicrometres
3. CMetres (m)
4. DKilometres (km)

In an enzyme reaction, what is the substrate?

1. AThe part of the enzyme that changes shape
2. BThe substance that the enzyme acts on
3. CThe gene that codes for the enzyme
4. DThe product released at the end

What are the building blocks (monomers) of proteins?

1. ANucleotides
2. BFatty acids
3. CMonosaccharides
4. DAmino acids

Where does the oxygen released by photosynthesis come from?

1. AFrom glucose that is broken down
2. BFrom chlorophyll that is used up
3. CFrom carbon dioxide molecules that are split
4. DFrom water molecules that are split

A thermometer gives readings of 36.1, 36.1 and 36.2 °C for a water bath that is really at 37.0 °C. How are these readings best described?

1. AAccurate but not precise
2. BNeither accurate nor precise
3. CPrecise but not accurate
4. DBoth accurate and precise

Which list puts these human energy sources in order from fastest to use to longest-lasting store?

1. AATP, then fat, then glycogen
2. BATP, then glycogen, then fat
3. CGlycogen, then ATP, then fat
4. DFat, then glycogen, then ATP

Bacteria from hot springs have enzymes that work best at about 80 °C, while most human enzymes work best near 37 °C. What is the best explanation?

1. ATheir enzymes are made of lipids, not proteins
2. BTheir enzymes have structures that stay stable at high temperatures
3. CTheir enzymes do not have an active site, so heat cannot affect them
4. DHigh temperature never affects any enzyme

A student gives fertiliser to 2 tomato plants and none to 2 others. The fertilised plants grow taller. What is the main weakness of the conclusion that fertiliser increases growth?

1. AHeight cannot be measured accurately
2. BThere was no independent variable
3. CFertiliser should have been given to all four plants
4. DThe sample size is too small to rule out chance