Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

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

1. A14
2. B1
3. C7
4. D0

What is the main role of carbohydrates in the human diet?

1. ATo build muscle tissue
2. BTo carry the body's genetic information
3. CTo form antibodies
4. DTo provide a quick source of energy

Dalam suatu percobaan, apa itu variabel terikat?

1. AFaktor yang sengaja diubah oleh peneliti
2. BHipotesis yang sedang diuji
3. CFaktor yang diukur untuk melihat pengaruhnya
4. DFaktor apa pun yang dijaga tetap konstan

Why does each type of virus infect only certain kinds of cells?

1. AIt must attach to specific receptor proteins on the cell surface
2. BIt can only enter cells that have no nucleus
3. CIt can only enter cells that are dividing by meiosis at that time
4. DIt must find cells with the same DNA as its own

A woman with blood type O has a child with a man of type AB. Which blood types can their children have?

1. AA or B
2. BA, B, AB or O
3. CO only
4. DO or AB

In gel electrophoresis, why does DNA move towards the positive electrode?

1. ADNA has no charge and moves at random
2. BDNA has a negative charge from its phosphate groups
3. CDNA has a positive charge from the nitrogen bases it contains
4. DDNA is pulled by gravity through the gel

A study finds that coffee drinkers have more lung cancer. Later it is found that coffee drinkers in the study also smoked more. What is smoking in this study?

1. AA placebo
2. BThe dependent variable
3. CThe control group
4. DA confounding variable

Potato cylinders are placed in sugar solutions of different strengths. They gain mass in weak solutions, lose mass in strong ones and show no change at 0,3 mol/L. What can be concluded?

1. APotato cells are always hypertonic to sugar solutions
2. BSugar enters the cells only by active transport, not by diffusion
3. CThe potato cells have a solute concentration of about 0,3 mol/L
4. DThe potato cells contain no water at all