1.Dễ
Glucose là ví dụ về loại phân tử nào?
- AProtein
- BPolysaccharide
- CLipid
- DMonosaccharide
2.Dễ
What is a chromosomal deletion?
- AThe swap of a single DNA base
- BA piece of chromosome that is turned around
- CThe loss of a piece of a chromosome
- DAn extra copy of a whole chromosome
3.Dễ
Phân tử DNA có hình dạng gì?
- AMột sợi đơn thẳng
- BMột vòng phẳng
- CChuỗi xoắn kép
- DChuỗi xoắn ba
4.Trung bình
What does RNA polymerase do?
- AIt builds a protein from an mRNA template
- BIt builds an RNA strand from a DNA template
- CIt removes introns from pre-mRNA
- DIt copies the whole genome before cell division
5.Trung bình
What is the role of ribosomal RNA (rRNA)?
- AIt carries the code from DNA to the ribosome
- BIt forms part of the ribosome and helps join amino acids
- CIt brings single amino acids to the ribosome
- DIt stores genetic information in the nucleus
6.Trung bình
Một hồng cầu được đặt vào nước tinh khiết. Điều gì có nhiều khả năng xảy ra nhất?
- ANó trương lên và có thể vỡ
- BNó giữ nguyên kích thước
- CNó phân chia thành hai tế bào
- DNó co lại và nhăn nheo
7.Khó
An Rh-negative mother gives birth to an Rh-positive baby. Why could a later Rh-positive pregnancy be at risk?
- AThe first baby's antibodies remain in her blood and attack her
- BThe second baby will be unable to make any red cells
- CHer red cells may become Rh positive after the birth
- DShe may have made anti-D antibodies that cross the placenta
8.Khó
Which evidence supports the theory that mitochondria came from bacteria that lived inside an ancient cell?
- AThey are found in all prokaryotic cells
- BThey make the proteins used by the whole cell, including the nucleus
- CThey have a cell wall made of peptidoglycan
- DThey have their own circular DNA, ribosomes and a double membrane
Đáp án
- 1. D · Monosaccharide
- 2. C · The loss of a piece of a chromosome
- 3. C · Chuỗi xoắn kép
- 4. B · It builds an RNA strand from a DNA template
- 5. B · It forms part of the ribosome and helps join amino acids
- 6. A · Nó trương lên và có thể vỡ
- 7. D · She may have made anti-D antibodies that cross the placenta
- 8. D · They have their own circular DNA, ribosomes and a double membrane
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