ใบงาน ชีววิทยาสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What is the main role of carbohydrates in the human diet?

1. ATo form antibodies
2. BTo build muscle tissue
3. CTo carry the body's genetic information
4. DTo provide a quick source of energy

What is the SI base unit of mass?

1. AGram
2. BKilogram
3. CLitre
4. DPound

ข้อใดอธิบายแบคทีเรียได้ถูกต้อง

1. Aไม่ใช่เซลล์ แต่เป็นอนุภาคของโปรตีนและดีเอ็นเอ
2. Bเป็นสิ่งมีชีวิตหลายเซลล์เหมือนพืช
3. Cเป็นยูคาริโอตเซลล์เดียวที่มีนิวเคลียส
4. Dเป็นโพรคาริโอตเซลล์เดียว

Why does PCR use a DNA polymerase taken from bacteria that live in hot springs?

1. AIt copies RNA as well as DNA
2. BIt makes the DNA strands stick together
3. CIt works only in the dark, like the bacteria it comes from
4. DIt survives the high temperatures used to separate the strands

When plotting the results of an experiment, which variable usually goes on the y-axis?

1. AThe independent variable
2. BThe time the experiment started
3. CThe dependent variable
4. DThe controlled variable

A tablet contains 2.5 g of a substance. How many milligrams is this?

1. A25 mg
2. B2500 mg
3. C250 mg
4. D0.0025 mg

Two genes lie very close together on the same chromosome. In a test cross, most offspring look like the parents instead of the expected 1:1:1:1 ratio. Why?

1. AThe genes are on different chromosomes and assort independently
2. BA frameshift mutation happened in both genes
3. CBoth genes show incomplete dominance
4. DThe genes are linked and are rarely separated by crossing over

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

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