ใบงาน ชีววิทยาสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What is the active site of an enzyme?

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

What is the resolution of a microscope?

1. AIts ability to show two close points as separate
2. BHow bright the image appears
3. CHow large the field of view is
4. DHow many times larger it makes the image of the specimen

What is true of a recessive allele?

1. AIts trait shows whenever one copy is present
2. BIts trait shows only when two copies are present
3. CIt is found only on the X chromosome
4. DIt is always harmful to the organism

What happens in the lytic cycle of a virus?

1. AThe virus divides by binary fission outside the cell
2. BThe viral DNA joins the host DNA and stays inactive for a long time
3. CThe host cell makes antibodies against the virus
4. DThe virus makes many copies in the host cell, which then bursts

ไขมันอิ่มตัวต่างจากไขมันไม่อิ่มตัวอย่างไร

1. Aมีพันธะคู่จำนวนมากและเป็นของเหลวที่อุณหภูมิห้อง
2. Bละลายในน้ำได้ง่าย
3. Cมีไนโตรเจนและสร้างโปรตีน
4. Dไม่มีพันธะคู่ C=C และมักเป็นของแข็ง

How are photosynthesis and aerobic respiration related?

1. ABoth happen only in animal cells, never in plant cells
2. BThe products of one are the reactants of the other
3. CBoth take place only in chloroplasts
4. DBoth release oxygen into the air

In the Hershey–Chase experiment, viruses were labelled with radioactive phosphorus in their DNA or radioactive sulfur in their protein. Only the phosphorus entered the infected bacteria. What did this show?

1. AProtein, not DNA, is the genetic material of the virus
2. BViruses contain no DNA at all
3. CDNA, not protein, is the genetic material of the virus
4. DBacteria take up any radioactive substance

Redi placed meat in open jars and in jars covered with gauze. Maggots appeared only on meat that flies could reach. What did this show?

1. AFlies form from rotting meat, and then they lay eggs on fresh meat
2. BGauze produces chemicals that stop meat from rotting
3. CMeat turns into maggots when exposed to air
4. DMaggots come from eggs laid by flies, not from the meat itself