ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

أي تركيب يوجد في الخلايا النباتية ولا يوجد في الخلايا الحيوانية؟

1. Aالريبوسوم
2. Bالغشاء الخلوي
3. Cالميتوكوندريا
4. Dالجدار الخلوي

In genetics, what is a carrier?

1. AA person with two recessive alleles who has the disorder
2. BA person with one recessive allele for a disorder but no symptoms
3. CA person who has a dominant disorder
4. DA person who has lost both alleles for the gene, so shows no trait

What is a eukaryote?

1. AAn organism made of a single cell without a nucleus
2. BAn organism whose cells have a nucleus
3. CAn organism that lives only in extreme heat
4. DA virus that infects animal cells

Why are stains such as iodine or methylene blue added to cells on a microscope slide?

1. ATo make structures easier to see
2. BTo make the cells larger
3. CTo keep the cells alive for longer
4. DTo make the cells divide

Why must human gametes be haploid?

1. ASo that the gametes can divide quickly by mitosis
2. BSo that the zygote has the normal number of 46 chromosomes
3. CSo that the gametes can make more proteins
4. DSo that the zygote has twice the normal number of chromosomes

What do the spindle fibres do during cell division?

1. AThey digest the old cell membrane
2. BThey attach to chromosomes and move them to the poles
3. CThey make the new nuclear envelope
4. DThey copy the DNA of each chromosome before the cell divides

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. A1/4
2. B3/4
3. C1/2
4. D9/16

Two genes lie very close together on the same chromosome. In a test cross, most offspring look like the parents instead of the expected 1:1:1:1 ratio. Why?

1. AThe genes are on different chromosomes and assort independently
2. BBoth genes show incomplete dominance
3. CThe genes are linked and are rarely separated by crossing over
4. DA frameshift mutation happened in both genes