ใบงาน ชีววิทยาสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

Which feature helps a sperm cell carry out its job?

1. AChloroplasts for making food
2. BA flagellum for swimming
3. CA large vacuole for storing water
4. DA cell wall for protection

What is an allele?

1. AA pair of matching chromosomes from each parent
2. BA section of DNA between genes
3. CA different version of the same gene
4. DA protein made from a gene

What is a mutagen?

1. ASomething that can cause changes in DNA
2. BA protein that repairs damaged DNA
3. CA cell that divides without control
4. DAn enzyme that copies DNA

โครงสร้างพื้นฐานของไวรัสเป็นอย่างไร

1. Aสารพันธุกรรมอยู่ภายในเปลือกโปรตีน
2. Bเซลล์เดียวที่มีไรโบโซมและไมโทคอนเดรีย
3. Cนิวเคลียสที่ล้อมรอบด้วยผนังเซลล์
4. Dสายกรดอะมิโนที่ไม่มีดีเอ็นเอหรืออาร์เอ็นเอ

In a food chain, which organisms are the producers?

1. AFungi that break down dead material
2. BPredators at the top of the chain
3. CPlants and algae that make food by photosynthesis
4. DAnimals that eat only plants, such as rabbits and deer

What is meant by independent assortment in meiosis?

1. AAll chromosomes from the mother go into the same gamete
2. BSister chromatids stay joined until the end of meiosis, so all gametes are identical
3. CDNA is copied separately in each chromosome
4. DHomologous pairs line up randomly, so gametes get different mixes of chromosomes

Bacteria in a closed flask grow quickly at first, but the population then stops increasing. What is the main reason?

1. AThe bacteria change into viruses after many divisions
2. BThe flask becomes too cold for growth
3. CNutrients run out and waste products build up
4. DThe bacteria stop dividing once they reach adult size

Ignoring crossing over, how many different combinations of chromosomes can one person's gametes have because of independent assortment?

1. A23², about 529
2. B2²³, about 8 million
3. C2 × 23, which is 46
4. D46, one for each chromosome