Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

What are restriction enzymes?

1. AEnzymes that copy RNA into DNA
2. BEnzymes that join amino acids into proteins
3. CEnzymes that digest fats in the intestine
4. DEnzymes that cut DNA at specific base sequences

What is the job of the capsule found around some bacteria?

1. AIt protects the cell, for example from white blood cells
2. BIt holds the bacterium's main chromosome
3. CIt helps the bacterium make energy by photosynthesis
4. DIt is used to swim through liquids

What is a heterotroph?

1. AAn organism that gets its food from other organisms
2. BAn organism that makes its own food by photosynthesis
3. CAn organism with no cells
4. DAn organism that lives only in water

By which process does oxygen enter a cell and carbon dioxide leave it?

1. ASimple diffusion through the lipid bilayer
2. BFacilitated diffusion through glucose carriers
3. CActive transport by membrane pumps
4. DEndocytosis in small vesicles

What causes cohesion between water molecules?

1. AHydrogen bonds between neighbouring molecules
2. BIonic bonds between oxygen atoms
3. CMagnetic forces between hydrogen atoms
4. DCovalent bonds between neighbouring molecules

What is meant by independent assortment in meiosis?

1. ASister chromatids stay joined until the end of meiosis, so all gametes are identical
2. BAll chromosomes from the mother go into the same gamete
3. CDNA is copied separately in each chromosome
4. DHomologous pairs line up randomly, so gametes get different mixes of chromosomes

A patient is given a large volume of hypotonic IV fluid too quickly. What is the most likely effect on the patient's cells?

1. ASalt moves into the cells, and they burst
2. BWater moves into the cells, and they swell
3. CNothing changes, because cells are not affected by IV fluid
4. DWater moves out of the cells, and they shrink

A human body cell has 46 chromosomes in G1. How many chromatids does it have at metaphase of mitosis?

1. A23
2. B92
3. C46
4. D184