Biology for nursing entrance exams worksheet with answers

Most enzymes belong to which group of biomolecules?

1. AMinerals
2. BLipids
3. CCarbohydrates
4. DProteins

In an enzyme reaction, what is the substrate?

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

What is the aim of gene therapy?

1. ATo remove all the genes from a patient's cells
2. BTo treat a disease by adding a working copy of a faulty gene
3. CTo give a patient antibiotics through a vein to kill a virus
4. DTo change the patient's blood type

A greenhouse is warm and brightly lit, but the air has very little carbon dioxide. What is most likely limiting the rate of photosynthesis?

1. AThe carbon dioxide concentration
2. BThe number of stomata
3. CThe temperature
4. DThe light intensity in the greenhouse

Where does the oxygen released by photosynthesis come from?

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

Which bond joins amino acids together in a protein?

1. APeptide bond
2. BEster bond
3. CHydrogen bond between bases
4. DGlycosidic bond

A survey finds that students who sleep more get higher test scores. Which study would best test whether more sleep causes better scores?

1. ASurvey a much larger group of students about their sleep habits
2. BRandomly assign students to different sleep times and compare their scores
3. CCompare the test scores of students at two different schools
4. DAsk the students with the highest scores how they study

A red blood cell is placed in a solution with the same solute concentration as its cytoplasm. What happens?

1. AWater molecules stop crossing the membrane in either direction
2. BThe cell shrinks as water leaves
3. CNo net water movement; the cell keeps its shape
4. DThe cell swells and bursts