ใบงาน ชีววิทยาสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

เบสใดพบในอาร์เอ็นเอแต่ไม่พบในดีเอ็นเอ

1. Aไทมีน
2. Bกัวนีน
3. Cยูราซิล
4. Dอะดีนีน

What is a genetically modified organism (GMO)?

1. AAn organism whose DNA has been changed by genetic engineering
2. BAn organism produced by normal sexual reproduction between two parents
3. CAn organism that has caught a virus
4. DAn organism that has been grown in a greenhouse

What is a monosaccharide?

1. AA fat made of glycerol and fatty acids
2. BA single sugar unit, such as glucose
3. CTwo sugars joined together, such as sucrose
4. DA chain of many amino acids

Drugs against fungal infections often cause more side effects than drugs against bacteria. Why?

1. AFungi have no cell membrane for drugs to act on
2. BFungi are much smaller than bacteria
3. CFungal cells are eukaryotic, like human cells
4. DFungi reproduce only by binary fission

Which element is found in all amino acids but not in carbohydrates?

1. ACarbon
2. BHydrogen
3. CNitrogen
4. DOxygen

HIV is a retrovirus. What does its enzyme reverse transcriptase do?

1. AIt makes DNA from the virus's RNA
2. BIt makes RNA from the host's DNA
3. CIt breaks down the host's ribosomes
4. DIt makes proteins from the virus's DNA

Cells lining the small intestine have tiny finger-like folds of membrane called microvilli. What does this tell you about their job?

1. AThey make digestive enzymes in large amounts
2. BThey protect the gut from bacteria by producing mucus
3. CThey absorb substances, so they need a large surface area
4. DThey move food along by beating like cilia

A nurse notices that patients who used a new mouthwash had few mouth infections. No other patients were studied. What is most needed before concluding that the mouthwash works?

1. AA larger bottle of the same mouthwash for each patient
2. BA comparable group that does not use the mouthwash
3. CA survey asking patients if they liked it
4. DA longer explanation in the report