1.Dễ
Which sex chromosomes does a typical human male have?
- AXY
- BXX
- CYY
- DX only
2.Dễ
What is an inference?
- AA conclusion reached from observations and prior knowledge
- BA measurement taken with a calibrated instrument in a laboratory
- CA variable that the scientist changes on purpose
- DA list of the materials used in an experiment
3.Dễ
Which substances are used up in aerobic cellular respiration?
- AOxygen and water
- BGlucose and carbon dioxide
- CCarbon dioxide and water
- DGlucose and oxygen
4.Trung bình
A deletion removes exactly three bases, forming one whole codon, from the middle of a gene. What is the most likely result?
- AThe protein becomes three times longer
- BThe protein lacks one amino acid but the rest is unchanged
- CEvery amino acid after the deletion is changed to a new one
- DNo protein can be made at all
5.Trung bình
What does it mean that a person's blood is Rh negative?
- ATheir red cells carry extra RhD antigen
- BTheir red cells lack the A and B antigens
- CTheir plasma has no antibodies at all
- DTheir red cells lack the RhD antigen
6.Trung bình
What is the difference between an antiseptic and a disinfectant?
- AAntiseptics are antibiotics; disinfectants are vaccines
- BAntiseptics are used on objects and floors; disinfectants are used on skin
- CAntiseptics kill all spores; disinfectants kill none
- DAntiseptics are used on living tissue; disinfectants are used on objects
7.Khó
Trong giảm phân, một cặp nhiễm sắc thể không phân li. Điều gì có thể xảy ra?
- AGiao tử không thể chứa bất kỳ DNA nào
- BGiao tử thừa hoặc thiếu một nhiễm sắc thể
- CGiao tử có số gene trên mỗi nhiễm sắc thể gấp đôi chính xác
- DGiao tử giống hệt tế bào mẹ về di truyền
8.Khó
After a meal, blood glucose rises. Which response brings it back to normal?
- AThe kidneys release insulin into the urine
- BThe liver stops storing glycogen and releases more glucose
- CThe pancreas releases glucagon, and the liver releases glucose
- DThe pancreas releases insulin, and cells take up glucose
Đáp án
- 1. A · XY
- 2. A · A conclusion reached from observations and prior knowledge
- 3. D · Glucose and oxygen
- 4. B · The protein lacks one amino acid but the rest is unchanged
- 5. D · Their red cells lack the RhD antigen
- 6. D · Antiseptics are used on living tissue; disinfectants are used on objects
- 7. B · Giao tử thừa hoặc thiếu một nhiễm sắc thể
- 8. D · The pancreas releases insulin, and cells take up glucose
Lời giải đầy đủ từng bước: hãy luyện chủ đề này trên examproblems.com.