1.쉬움
What is the main material in the cell wall of bacteria?
- ACellulose
- BChitin
- CPeptidoglycan
- DKeratin
2.쉬움
In biology, what is a clone?
- AAn offspring of two different parents
- BA cell with an extra chromosome
- CA genetically identical copy of an organism, cell or gene
- DAn organism that carries genes from two different species
3.쉬움
단백질의 구성 단위(단위체)는 무엇인가요?
- A뉴클레오타이드
- B지방산
- C아미노산
- D단당류
4.보통
Clostridium tetani grows in deep puncture wounds but is killed by oxygen. How is this bacterium described?
- AAn obligate anaerobe
- BA photosynthetic bacterium
- CAn obligate aerobe
- DA facultative anaerobe
5.보통
Which sequence describes the usual flow of genetic information in a cell?
- ARNA to DNA to protein
- BProtein to RNA to DNA
- CDNA to RNA to protein
- DDNA to protein to RNA
6.보통
In which phase of mitosis do the chromosomes condense and the nuclear envelope break down?
- AAnaphase
- BProphase
- CMetaphase
- DTelophase
7.어려움
Mature human red blood cells have no nucleus and no mitochondria. What follows from this?
- AThey make ATP by aerobic respiration using the oxygen they carry
- BThey keep making new haemoglobin throughout their life
- CThey live longer than almost all other body cells
- DThey cannot divide and make their ATP by glycolysis only
8.어려움
Why are modified viruses often used to deliver genes in gene therapy?
- AViruses are larger than human cells, so they can carry many genes
- BViruses naturally insert their genetic material into host cells
- CViruses can reproduce without a host cell
- DViruses produce antibodies that fix faulty genes
정답표
- 1. C · Peptidoglycan
- 2. C · A genetically identical copy of an organism, cell or gene
- 3. C · 아미노산
- 4. A · An obligate anaerobe
- 5. C · DNA to RNA to protein
- 6. B · Prophase
- 7. D · They cannot divide and make their ATP by glycolysis only
- 8. B · Viruses naturally insert their genetic material into host cells
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