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

What is a neuron?

1. AA bone cell that stores calcium
2. BA nerve cell that carries electrical signals
3. CA muscle cell that contracts
4. DA blood cell that carries oxygen around the body

What is a mutagen?

1. AA protein that repairs damaged DNA
2. BSomething that can cause changes in DNA
3. CA cell that divides without control
4. DAn enzyme that copies DNA

What does DNA replication produce?

1. ATwo identical DNA molecules
2. BFour different DNA molecules
3. CA new protein
4. DOne mRNA molecule

Why do root hair cells have long, thin extensions?

1. ATo carry out photosynthesis underground
2. BTo increase the surface area for absorbing water
3. CTo anchor the plant firmly against strong winds and rain
4. DTo store starch for the winter

Cấu trúc nào có ở cả tế bào nhân sơ và tế bào nhân thực?

1. ATy thể
2. BNhân
3. CLưới nội chất
4. DRibosome

What is a prion?

1. AA bacterium without a cell wall that lives inside nerve cells
2. BA fungal spore that infects the brain
3. CA very small virus with a DNA genome
4. DA misfolded protein that causes normal proteins to misfold

The number of bacteria in a sample rises from 200 to 500. What is the percentage increase?

1. A300%
2. B150%
3. C250%
4. D60%

After wolves are removed from a park, the deer population rises sharply and young trees are overgrazed. What does this show?

1. ADeer are producers in the food web
2. BOrganisms in a food web depend on each other
3. CWolves compete with trees for sunlight
4. DRemoving a predator has no effect on plants