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

Which carbohydrate forms plant cell walls and acts as dietary fibre?

1. ACellulose
2. BGlucose
3. CGlycogen
4. DLactose

Who first used the word "cells" after looking at thin slices of cork under a microscope?

1. AGregor Mendel
2. BRobert Hooke
3. CCharles Darwin
4. DLouis Pasteur

What is activation energy?

1. AThe energy needed to start a chemical reaction
2. BThe heat released when a reaction finishes
3. CThe energy stored in a molecule of ATP
4. DThe energy plants take in from sunlight

What is the function of the pores in the nuclear envelope?

1. AThey attach the nucleus to the cell membrane
2. BThey let chromosomes leave the nucleus to be copied
3. CThey make ribosomal RNA for the cell
4. DThey let molecules such as mRNA pass in and out

Why do root hair cells have long, thin extensions?

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

A seedling is 4 cm tall at week 1, 8 cm at week 2, 12 cm at week 3 and 16 cm at week 4. If the trend continues, how tall will it be at week 6?

1. A32 cm
2. B20 cm
3. C24 cm
4. D18 cm

The antibiotic tetracycline binds to bacterial ribosomes. Which process does it block, and why are human cells much less affected?

1. ATranscription, because human cells have no RNA polymerase of their own
2. BDNA replication, because bacteria have no DNA polymerase
3. CTranslation, because human cells have no ribosomes
4. DTranslation, because bacterial ribosomes differ from human ribosomes

A man has Klinefelter syndrome (XXY). Which error most likely produced it?

1. AExtra mitosis in the zygote after fertilisation
2. BA frameshift mutation in one of the genes on the father's Y chromosome
3. CCrossing over between chromosome 21 and the X chromosome
4. DNondisjunction of the sex chromosomes during meiosis in a parent