1.Dễ
What is an allele?
- AA pair of matching chromosomes from each parent
- BA protein made from a gene
- CA section of DNA between genes
- DA different version of the same gene
2.Dễ
What is the main role of carbohydrates in the human diet?
- ATo carry the body's genetic information
- BTo build muscle tissue
- CTo provide a quick source of energy
- DTo form antibodies
3.Dễ
What is apoptosis?
- AFusion of two gametes
- BProgrammed cell death
- CUncontrolled cell division
- DDivision of the cytoplasm
4.Trung bình
DNA được sao chép vào lúc nào trong chu kỳ tế bào?
- AChỉ trong giảm phân II
- BTrong quá trình phân chia tế bào chất
- CỞ pha S của gian kỳ
- DTrong kỳ giữa của nguyên phân
5.Trung bình
During childbirth, pressure on the cervix causes oxytocin release, which causes stronger contractions and more pressure. What kind of control is this?
- APositive feedback
- BNatural selection
- CNegative feedback
- DHomeostatic balance
6.Trung bình
Sản phẩm của hô hấp tế bào hiếu khí là gì?
- ACarbon dioxide, nước và ATP
- BTinh bột và nước
- CAcid lactic và oxygen
- DGlucose và oxygen
7.Khó
Some snakes and whales have tiny remains of hip bones that are not used for walking. What do these structures suggest?
- AThey will grow legs in the future
- BThey were caused by a recent mutation
- CTheir ancestors had legs
- DThe bones are needed for swimming
8.Khó
A karyotype shows three copies of chromosome 21. Which condition does this indicate, and how many chromosomes does the person have?
- ADown syndrome, with 45 chromosomes
- BTurner syndrome, with 47 chromosomes
- CKlinefelter syndrome, with 45 chromosomes
- DDown syndrome, with 47 chromosomes
Đáp án
- 1. D · A different version of the same gene
- 2. C · To provide a quick source of energy
- 3. B · Programmed cell death
- 4. C · Ở pha S của gian kỳ
- 5. A · Positive feedback
- 6. A · Carbon dioxide, nước và ATP
- 7. C · Their ancestors had legs
- 8. D · Down syndrome, with 47 chromosomes
Lời giải đầy đủ từng bước: hãy luyện chủ đề này trên examproblems.com.