Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

What is homeostasis?

1. AKeeping a stable internal environment
2. BChanging a species over many generations
3. CMaking identical copies of a cell
4. DBreaking down food for energy

What is an adaptation?

1. AAny mutation that damages a gene
2. BA disease that weakens a population
3. CAn inherited trait that helps an organism survive in its environment
4. DA change an organism makes during its lifetime that it then passes on

What are the bacteria called that normally live on the skin and in the gut without causing disease?

1. ANormal flora
2. BPrions
3. CPathogens
4. DVectors

A cut in the skin heals as new skin cells fill the wound. Which process produces these cells?

1. AFertilisation
2. BMitosis
3. CBinary fission
4. DMeiosis

What does the enzyme lipase break down?

1. AFats into fatty acids and glycerol
2. BDNA into nucleotides
3. CStarch into sugars
4. DProteins into amino acids and peptides

What causes cohesion between water molecules?

1. AMagnetic forces between hydrogen atoms
2. BCovalent bonds between neighbouring molecules
3. CHydrogen bonds between neighbouring molecules
4. DIonic bonds between oxygen atoms

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. A500 base pairs
2. B1500 base pairs
3. C1000 base pairs
4. D300 base pairs

People who carry one sickle cell allele are more resistant to malaria. Why is the allele common in regions where malaria is widespread?

1. APeople with two sickle alleles are fully healthy there
2. BThe allele is dominant, so it spreads by itself
3. CNatural selection favours the heterozygotes there
4. DMalaria causes the sickle cell mutation directly