Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

Who first worked out the basic rules of inheritance by breeding pea plants?

1. ARobert Hooke
2. BCharles Darwin
3. CLouis Pasteur
4. DGregor Mendel

Which sugar is found in DNA?

1. AFructose
2. BRibose
3. CGlucose
4. DDeoxyribose

What is an organism's genotype?

1. AThe number of cells in its body
2. BThe traits that can be seen or measured
3. CThe alleles it carries for a trait
4. DThe environment in which it lives

Sickle cell disease is caused by a single base change that replaces one amino acid in haemoglobin. What type of mutation is this?

1. AA missense mutation
2. BA nonsense mutation
3. CA frameshift mutation
4. DA silent mutation

What is an inversion mutation?

1. AA segment of a chromosome moves to a different, non-matching chromosome
2. BA chromosome segment breaks off and is reattached the wrong way round
3. CA segment of a chromosome is lost completely
4. DA whole extra chromosome is added to the cell

Why can small nonpolar molecules cross the cell membrane easily while ions cannot?

1. AThe membrane carries a strong positive charge
2. BIons are larger than most membrane proteins
3. CThe bilayer's core is made of hydrophobic tails
4. DThe membrane is made mostly of long carbohydrate chains

Why does the influenza vaccine need to be updated most years?

1. AThe virus keeps changing its surface proteins through mutation
2. BInfluenza is caused by a different bacterium each year
3. CThe vaccine damages the immune system after one year, so it must be repeated
4. DAntibodies cannot be made against viruses

In the Hershey–Chase experiment, viruses were labelled with radioactive phosphorus in their DNA or radioactive sulfur in their protein. Only the phosphorus entered the infected bacteria. What did this show?

1. ABacteria take up any radioactive substance
2. BViruses contain no DNA at all
3. CProtein, not DNA, is the genetic material of the virus
4. DDNA, not protein, is the genetic material of the virus