ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is a zygote?

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

What is a neuron?

1. AA blood cell that carries oxygen around the body
2. BA nerve cell that carries electrical signals
3. CA bone cell that stores calcium
4. DA muscle cell that contracts

In which stage of the cell cycle does a cell spend most of its time?

1. AInterphase
2. BMetaphase
3. CProphase
4. DAnaphase

Identical twins raised in different homes have different body weights. What does this show?

1. ABody weight is controlled by a single gene
2. BThe twins must have different genotypes for body weight genes
3. CMutations happened in every cell of one twin
4. DThe phenotype depends on environment as well as genotype

تطابقت نتائج تجربة مع توقعات الفرضية. ما أفضل استنتاج؟

1. Aلا حاجة إلى تجارب أخرى أبدًا
2. Bصارت الفرضية الآن قانونًا من قوانين الطبيعة
3. Cالفرضية مدعومة، لكنها غير مثبتة
4. Dثبتت صحة الفرضية في جميع الحالات

HIV is a retrovirus. What does its enzyme reverse transcriptase do?

1. AIt breaks down the host's ribosomes
2. BIt makes DNA from the virus's RNA
3. CIt makes proteins from the virus's DNA
4. DIt makes RNA from the host's DNA

تحتوي خلية في حيوان على 20 صبغيًا. كم صبغيًا في كل مشيج من أمشاجه بعد انقسام اختزالي طبيعي؟

1. A40
2. B20
3. C5
4. D10

Scientists put a human gene into bacteria to make a protein. Why do they use a DNA copy made from the mature mRNA instead of the gene taken straight from human DNA?

1. ABacteria have no ribosomes
2. BBacteria cannot remove introns
3. CBacteria cannot read human codons
4. DHuman DNA has no start codons