ใบงาน ชีววิทยาสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

ในดีเอ็นเอ อะดีนีนจับคู่กับเบสใดเสมอ

1. Aไซโทซีน
2. Bไทมีน
3. Cยูราซิล
4. Dกัวนีน

What is a eukaryote?

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

In the scientific name Homo sapiens, what does Homo name?

1. AThe kingdom
2. BThe genus
3. CThe family
4. DThe species

โครงสร้างใดพบทั้งในเซลล์โพรคาริโอตและยูคาริโอต

1. Aนิวเคลียส
2. Bเอนโดพลาสมิกเรติคิวลัม
3. Cไมโทคอนเดรีย
4. Dไรโบโซม

พืชที่มีจีโนไทป์ Aa ผสมกับพืช aa คาดว่าลูกหลานสัดส่วนเท่าใดจะแสดงลักษณะด้อย

1. A1/2
2. B3/4
3. C1/4
4. Dไม่มีเลย

A deletion removes exactly three bases, forming one whole codon, from the middle of a gene. What is the most likely result?

1. AThe protein becomes three times longer
2. BThe protein lacks one amino acid but the rest is unchanged
3. CNo protein can be made at all
4. DEvery amino acid after the deletion is changed to a new one

Why does the influenza vaccine need to be updated most years?

1. AAntibodies cannot be made against viruses
2. BInfluenza is caused by a different bacterium each year
3. CThe vaccine damages the immune system after one year, so it must be repeated
4. DThe virus keeps changing its surface proteins through mutation

The rate of an enzyme reaction rises as substrate is added but then levels off, even when more substrate is added. Why?

1. AThe substrate has become an inhibitor
2. BThe products have turned back into substrate
3. CThe enzyme has been denatured
4. DAll the active sites are occupied