Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

What is a mutagen?

1. ASomething that can cause changes in DNA
2. BAn enzyme that copies DNA
3. CA cell that divides without control
4. DA protein that repairs damaged DNA

Which elements make up carbohydrates?

1. AHydrogen, oxygen and phosphorus
2. BCarbon, hydrogen and oxygen
3. CCarbon, nitrogen and sulfur
4. DCarbon, hydrogen and nitrogen

What is the pH of pure water at 25 °C?

1. A1
2. B14
3. C0
4. D7

Which statement about identical and non-identical twins is correct?

1. AIdentical twins come from two eggs that are fertilised by a single sperm
2. BIdentical twins come from one zygote; non-identical twins come from two
3. CBoth kinds of twin always share all of their genes
4. DNon-identical twins come from one zygote that splits in two

Why do plants wilt when the soil around their roots becomes very salty?

1. AWater leaves the root cells by osmosis
2. BThe roots take in too much water
3. CSalt blocks sunlight from reaching the leaves
4. DSalt makes the root cells swell and burst

Which DNA bases are purines?

1. ACytosine and guanine
2. BCytosine and thymine
3. CAdenine and guanine
4. DAdenine and thymine

At 100× total magnification, the field of view of a microscope is 2 mm wide. What is its width at 400×?

1. A0,2 mm
2. B0,5 mm
3. C8 mm
4. D2 mm

Liver cells take in cholesterol-carrying LDL particles only after the particles bind to specific proteins on the cell surface. Which process is this?

1. AExocytosis
2. BReceptor-mediated endocytosis
3. CPinocytosis of extracellular fluid
4. DSimple diffusion