1.やさしい
What does transfer RNA (tRNA) do?
- AIt carries the code out of the nucleus
- BIt copies DNA in the nucleus
- CIt brings amino acids to the ribosome
- DIt joins two DNA strands together
2.やさしい
What does homozygous mean?
- AHaving two identical alleles for a gene
- BHaving two different alleles for a gene
- CHaving an extra chromosome
- DHaving only one copy of a gene
3.やさしい
What is phagocytosis?
- AA cell releasing hormones by exocytosis
- BA cell engulfing large particles such as bacteria
- CA cell taking in small droplets of fluid
- DA cell dividing into two identical daughter cells
4.ふつう
鋳型DNA鎖の配列が T-A-C である。対応するmRNAのコドンはどれか。
- AA-U-G
- BT-A-C
- CU-T-G
- DA-T-G
5.ふつう
Identical twins raised in different homes have different body weights. What does this show?
- AMutations happened in every cell of one twin
- BBody weight is controlled by a single gene
- CThe phenotype depends on environment as well as genotype
- DThe twins must have different genotypes for body weight genes
6.ふつう
体細胞分裂のどの時期に、姉妹染色分体が反対の極へ引かれるか。
- A前期
- B中期
- C後期
- D間期
7.むずかしい
A farmer's crops grow poorly in soil lacking nitrates. Why do plants need nitrogen?
- ATo absorb more carbon dioxide through the stomata
- BTo make amino acids, proteins and nucleic acids
- CTo build cellulose cell walls
- DTo make glucose during photosynthesis
8.むずかしい
A student puts a fertilised plant in a sunny window and an unfertilised plant in a dark cupboard. The fertilised plant grows more. What is the main flaw?
- AThere was no hypothesis to test
- BThe student used too much fertiliser on the plant in the window
- CTwo variables were changed, so the cause is unclear
- DThe dependent variable was not measured
解答
- 1. C · It brings amino acids to the ribosome
- 2. A · Having two identical alleles for a gene
- 3. B · A cell engulfing large particles such as bacteria
- 4. A · A-U-G
- 5. C · The phenotype depends on environment as well as genotype
- 6. C · 後期
- 7. B · To make amino acids, proteins and nucleic acids
- 8. C · Two variables were changed, so the cause is unclear
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