ใบงาน ชีววิทยาสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

Which molecules, made by immune cells, bind to specific antigens?

1. AEnzymes
2. BPhospholipids
3. CAntibodies
4. DHormones

Which protein carries oxygen in red blood cells?

1. ACollagen
2. BKeratin
3. CHaemoglobin
4. DInsulin

What is the main material in the cell walls of fungi?

1. ACollagen
2. BCellulose
3. CChitin
4. DPeptidoglycan

After gel electrophoresis, which DNA fragments are found furthest from the wells?

1. AThe smallest fragments
2. BThe largest fragments
3. CThe fragments with the most adenine
4. DThe fragments with the most guanine

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

A person catches chickenpox once and does not usually become ill with it again. Why?

1. AThe virus stays in the blood and kills new viruses
2. BThe skin becomes thicker after the first infection
3. CAntibodies from the first infection turn into new viruses
4. DMemory cells give a faster, stronger response the next time

Two populations of one species live on separate islands for many thousands of years. When brought together, they can no longer interbreed. What has happened?

1. AHybrid vigour from crossbreeding
2. BArtificial selection by humans
3. CSpeciation after geographic isolation
4. DHomeostasis in both populations

Why are modified viruses often used to deliver genes in gene therapy?

1. AViruses are larger than human cells, so they can carry many genes
2. BViruses produce antibodies that fix faulty genes
3. CViruses can reproduce without a host cell
4. DViruses naturally insert their genetic material into host cells