ใบงาน ชีววิทยาสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What is a eukaryote?

1. AAn organism whose cells have a nucleus
2. BAn organism made of a single cell without a nucleus
3. CAn organism that lives only in extreme heat
4. DA virus that infects animal cells

What is the active site of an enzyme?

1. AThe region where the substrate binds
2. BThe product formed by the reaction
3. CThe gene that codes for the enzyme
4. DThe part of the cell where the enzyme is made

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

1. AGlycogen
2. BCellulose
3. CGlucose
4. DLactose

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

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

There are 64 possible codons but only about 20 amino acids. What does this tell you about the genetic code?

1. AOnly 20 of the codons are ever used
2. BMost amino acids are coded for by more than one codon
3. CEach amino acid has exactly three codons
4. DEach codon codes for more than one amino acid at the same time

Why is water good at dissolving salts and sugars?

1. AIt has a very low boiling point
2. BIts molecules are polar
3. CIt contains carbon atoms
4. DIts molecules are nonpolar

Home pregnancy tests use antibodies that bind the hormone hCG. Why do they react with hCG and not with other proteins in urine?

1. AUrine contains no other proteins at all
2. BThe hormone hCG is a type of antibody itself
3. CEach antibody binds a specific antigen shape
4. DAntibodies bind every protein but change colour only with hCG

After a meal, blood glucose rises. Which response brings it back to normal?

1. AThe pancreas releases glucagon, and the liver releases glucose
2. BThe liver stops storing glycogen and releases more glucose
3. CThe pancreas releases insulin, and cells take up glucose
4. DThe kidneys release insulin into the urine