解答つき看護学校入学試験のための生物ワークシート

真核細胞でATPの大部分をつくる細胞小器官はどれか。

1. Aミトコンドリア
2. Bリボソーム
3. Cリソソーム
4. Dゴルジ体

Which sex chromosomes does a typical human male have?

1. AXY
2. BX only
3. CYY
4. DXX

ウイルスが単独で増殖できないのはなぜか。

1. A日光の下でしか増殖しないから
2. B減数分裂でしか分裂しないから
3. CDNAもRNAも、いかなる遺伝物質ももたないから
4. Dコピーをつくるために宿主細胞の仕組みを必要とするから

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。

1. A間期
2. B中期
3. C前期
4. D後期

To insert a human gene into a bacterial plasmid, scientists cut both the gene and the plasmid with the same restriction enzyme. Why?

1. ASo the gene is turned into RNA
2. BSo both pieces become exactly the same length
3. CSo the cut ends match and can join together
4. DSo the plasmid loses all its genes

What do nitrogen-fixing bacteria do?

1. AThey release nitrogen gas from dead organisms into the air
2. BThey break down proteins into glucose
3. CThey turn carbon dioxide into sugar
4. DThey convert nitrogen gas into compounds that plants can use

People who carry one sickle cell allele are more resistant to malaria. Why is the allele common in regions where malaria is widespread?

1. AMalaria causes the sickle cell mutation directly
2. BPeople with two sickle alleles are fully healthy there
3. CThe allele is dominant, so it spreads by itself
4. DNatural selection favours the heterozygotes there

A pre-mRNA is 3000 bases long, and 1200 bases of introns are removed. If all remaining bases code for amino acids, what is the largest number of amino acids in the protein?

1. A600
2. B1000
3. C400
4. D1800