Biology for nursing entrance exams worksheet with answers

What do receptor proteins in the cell membrane do?

1. AThey make ATP for the cell
2. BThey digest bacteria that enter the cell
3. CThey bind specific signal molecules, such as hormones
4. DThey store the cell's genetic code for making proteins

Which instrument is used to see individual cells?

1. AA microscope
2. BA spectrometer for sound
3. CA thermometer
4. DA telescope

What is the single most important way to prevent the spread of infection in hospitals?

1. AWearing a hair net
2. BHand hygiene
3. COpening the windows
4. DGiving every patient antibiotics

Many vitamins act as coenzymes. What does this mean?

1. AThey are digested to release large amounts of energy
2. BThey replace enzymes that have been denatured
3. CThey are built into the cell membrane
4. DThey help enzymes carry out their reactions

When does crossing over between homologous chromosomes happen?

1. AIn telophase II of meiosis
2. BIn prophase I of meiosis
3. CIn the S phase of interphase
4. DIn anaphase of mitosis

Two heterozygous parents (Aa × Aa) are crossed, and A is completely dominant. What is the expected phenotype ratio?

1. AAll dominant
2. B1 dominant : 2 intermediate : 1 recessive
3. C3 dominant : 1 recessive
4. D1 dominant : 1 recessive

How does a population of bacteria become resistant to an antibiotic?

1. AA few bacteria already carry resistance genes, survive the drug and multiply
2. BThe patient's immune system makes the bacteria resistant
3. CEach bacterium learns to resist the drug after being exposed
4. DThe antibiotic deliberately creates the exact mutation the bacteria need

An old idea says giraffes got long necks because each one stretched to reach leaves and passed the longer neck to its young. Why is this idea rejected?

1. ANeck length is not affected by any genes
2. BChanges acquired in a lifetime are not passed on in the genes
3. CGiraffes do not eat leaves from tall trees, so stretching is not needed
4. DOnly plants can pass on traits to offspring