ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is the R group of an amino acid?

1. AThe amino group that is shared by all amino acids
2. BThe carboxyl group at one end
3. CThe side chain that differs between amino acids
4. DThe peptide bond between two amino acids

What is a Punnett square used for?

1. AShowing the order of genes on a chromosome
2. BCounting the chromosomes in a cell
3. CPredicting the possible genotypes of offspring
4. DMeasuring the size of a cell

What does the polymerase chain reaction (PCR) do?

1. AIt turns RNA into protein
2. BIt makes many copies of a piece of DNA
3. CIt cuts DNA at specific sequences
4. DIt separates proteins by their charge

A tall pea plant could be TT or Tt. Which cross will best reveal its genotype?

1. ACross it with a short (tt) plant
2. BLet it grow for a longer time
3. CCross it with a TT plant
4. DCross it with another tall plant

لُقّح نبات أزهاره حمراء مع نبات أزهاره بيضاء، وكانت جميع الأفراد الناتجة ذات أزهار وردية. ماذا يبيّن ذلك؟

1. Aالسيادة التامة
2. Bصفة مرتبطة بالجنس
3. Cالسيادة المشتركة
4. Dالسيادة غير التامة

Which element is found in all amino acids but not in carbohydrates?

1. AHydrogen
2. BNitrogen
3. COxygen
4. DCarbon

Potato cylinders are placed in sugar solutions of different strengths. They gain mass in weak solutions, lose mass in strong ones and show no change at 0,3 mol/L. What can be concluded?

1. APotato cells are always hypertonic to sugar solutions
2. BThe potato cells have a solute concentration of about 0,3 mol/L
3. CThe potato cells contain no water at all
4. DSugar enters the cells only by active transport, not by diffusion

A man has Klinefelter syndrome (XXY). Which error most likely produced it?

1. AA frameshift mutation in one of the genes on the father's Y chromosome
2. BNondisjunction of the sex chromosomes during meiosis in a parent
3. CExtra mitosis in the zygote after fertilisation
4. DCrossing over between chromosome 21 and the X chromosome