Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

What is a trait that is controlled by many genes called?

1. AA sex-linked trait
2. BA polygenic trait
3. CA codominant trait
4. DA recessive trait

What are the parts of a triglyceride (a fat molecule)?

1. AThree glucose units and one phosphate
2. BOne glycerol and three fatty acids
3. COne amino acid and three fatty acids
4. DTwo glycerols and one fatty acid

In genetics, what is a carrier?

1. AA person who has lost both alleles for the gene, so shows no trait
2. BA person with two recessive alleles who has the disorder
3. CA person who has a dominant disorder
4. DA person with one recessive allele for a disorder but no symptoms

HIV is a retrovirus. What does its enzyme reverse transcriptase do?

1. AIt makes proteins from the virus's DNA
2. BIt makes DNA from the virus's RNA
3. CIt makes RNA from the host's DNA
4. DIt breaks down the host's ribosomes

Why does ice float on liquid water?

1. AHydrogen bonds hold ice in an open, less dense structure
2. BIce molecules are lighter than liquid water molecules
3. CIce contains more air than liquid water
4. DIce is denser than liquid water

In evolution, what does an organism's fitness mean?

1. AHow long the organism lives
2. BHow large the organism grows
3. CHow strong and fast the organism is compared with others
4. DHow many offspring it leaves that survive and reproduce

Sweating cools the body. Which property of water best explains this?

1. AIt is a nonpolar solvent
2. BIt takes a lot of heat energy to evaporate
3. CIt has a very low specific heat
4. DIt is less dense as ice than as a liquid

A point mutation changes a codon in the middle of a gene into a stop codon. What is the most likely effect?

1. AA shortened protein that usually does not work
2. BNo change, because stop codons are ignored
3. CA protein with one different amino acid
4. DA protein that is longer than normal