护理入学考试生物练习卷（附答案）

What does transfer RNA (tRNA) do?

1. AIt copies DNA in the nucleus
2. BIt brings amino acids to the ribosome
3. CIt carries the code out of the nucleus
4. DIt joins two DNA strands together

What is a heterotroph?

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

Which piece of equipment gives the most precise measurement of a liquid volume?

1. AA beaker
2. BA test tube
3. CA graduated cylinder
4. DA Petri dish

Golden rice was genetically modified to make beta-carotene. What is the aim?

1. ATo make the rice resistant to all insects
2. BTo help prevent vitamin A deficiency
3. CTo increase the protein content of the rice
4. DTo make the rice grow faster in cold climates

How are photosynthesis and aerobic respiration related?

1. ABoth happen only in animal cells, never in plant cells
2. BBoth release oxygen into the air
3. CThe products of one are the reactants of the other
4. DBoth take place only in chloroplasts

When plotting the results of an experiment, which variable usually goes on the y-axis?

1. AThe independent variable
2. BThe time the experiment started
3. CThe dependent variable
4. DThe controlled variable

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. AReceptor-mediated endocytosis
2. BPinocytosis of extracellular fluid
3. CExocytosis
4. DSimple diffusion

In uncontrolled diabetes, glucose appears in the urine and the person passes large volumes of urine. What is the best explanation?

1. AGlucose makes the kidneys absorb more water
2. BInsulin makes the kidneys filter more blood
3. CGlucose in the kidney filtrate holds water by osmosis
4. DGlucose is broken down into water in the bladder