Phiếu bài tập Sinh học cho kỳ thi đầu vào điều dưỡng có đáp án

What are the bacteria called that normally live on the skin and in the gut without causing disease?

1. AVectors
2. BPrions
3. CPathogens
4. DNormal flora

What is the main job of the large central vacuole in a plant cell?

1. AIt assembles proteins from amino acids
2. BIt stores water and keeps the cell firm
3. CIt copies DNA before the cell divides
4. DIt captures light energy for photosynthesis

In biology, what is a clone?

1. AA genetically identical copy of an organism, cell or gene
2. BA cell with an extra chromosome
3. CAn offspring of two different parents
4. DAn organism that carries genes from two different species

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

1. AEndocytosis in small vesicles
2. BActive transport by membrane pumps
3. CSimple diffusion through the lipid bilayer
4. DFacilitated diffusion through glucose carriers

A bone marrow transplant can treat some blood cancers. Why does it work?

1. AThe transplant replaces the patient's bones
2. BThe donor marrow contains antibiotics that kill cancer
3. CThe donor red cells divide to make more red cells
4. DThe donor stem cells produce new, healthy blood cells

Which DNA bases are purines?

1. AAdenine and guanine
2. BAdenine and thymine
3. CCytosine and guanine
4. DCytosine and thymine

Why can a scientific hypothesis never be proven true with absolute certainty?

1. ANew evidence could always contradict it in the future
2. BScientists are not allowed to reach any conclusions
3. CEvery experiment contains a mistake
4. DHypotheses are only opinions and cannot be tested

In a family, a trait appears mostly in males. Affected men have daughters who are unaffected, but some of these daughters have affected sons. Which pattern fits best?

1. AAutosomal dominant
2. BX-linked recessive
3. CY-linked
4. DAutosomal recessive with equal sexes