Cevaplı Hemşirelik giriş sınavları için biyoloji çalışma kâğıdı

Mitoz ne üretir?

1. AKromozom sayısı iki katına çıkmış bir hücre
2. BGenetik olarak özdeş iki yavru hücre
3. CKromozom sayısı yarıya inmiş iki hücre
4. DGenetik olarak farklı dört yavru hücre

What is a zygote?

1. AA body cell that has just completed its first round of mitosis
2. BThe diploid cell formed when a sperm fertilises an egg
3. CAn unfertilised egg cell
4. DA haploid cell made by meiosis

What is the main material in the cell walls of fungi?

1. ACellulose
2. BChitin
3. CCollagen
4. DPeptidoglycan

What is an inversion mutation?

1. AA segment of a chromosome is lost completely
2. BA whole extra chromosome is added to the cell
3. CA chromosome segment breaks off and is reattached the wrong way round
4. DA segment of a chromosome moves to a different, non-matching chromosome

A seedling is 4 cm tall at week 1, 8 cm at week 2, 12 cm at week 3 and 16 cm at week 4. If the trend continues, how tall will it be at week 6?

1. A24 cm
2. B18 cm
3. C32 cm
4. D20 cm

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

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

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

A plant that is AaBb is crossed with an AaBB plant. A and B are dominant, and the genes assort independently. What fraction of the offspring show both dominant traits?

1. A3/4
2. B1/4
3. C9/16
4. D1/2