Biology for nursing entrance exams worksheet with answers

Which protein carries oxygen in red blood cells?

1. ACollagen
2. BInsulin
3. CKeratin
4. DHaemoglobin

What is activation energy?

1. AThe energy needed to start a chemical reaction
2. BThe heat released when a reaction finishes
3. CThe energy plants take in from sunlight
4. DThe energy stored in a molecule of ATP

Against which kind of organism are antibiotics effective?

1. AViruses
2. BEvery type of microorganism equally
3. CPollen allergens
4. DBacteria

What causes cohesion between water molecules?

1. AMagnetic forces between hydrogen atoms
2. BIonic bonds between oxygen atoms
3. CCovalent bonds between neighbouring molecules
4. DHydrogen bonds between neighbouring molecules

The results of an experiment do not support the hypothesis. What should the scientist do next?

1. AChange the data so they fit the hypothesis
2. BRevise the hypothesis and test it again
3. CStop doing any further research on the question
4. DReport that the hypothesis was proven correct

To insert a human gene into a bacterial plasmid, scientists cut both the gene and the plasmid with the same restriction enzyme. Why?

1. ASo the plasmid loses all its genes
2. BSo both pieces become exactly the same length
3. CSo the cut ends match and can join together
4. DSo the gene is turned into RNA

Kidney tubule cells move glucose from the filtrate back into the blood, even when there is less glucose in the filtrate than in the cells. What does this show?

1. AGlucose is moved by active transport
2. BGlucose is moved by simple diffusion
3. CGlucose moves only down its gradient
4. DGlucose is moved by osmosis

In a drug trial, one group receives a sugar pill that looks like the real drug. Why?

1. ATo control for the placebo effect, the improvement caused by expecting treatment
2. BTo make sure every patient is cured
3. CTo increase the dose of the real drug
4. DTo save money on the real drug