ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is the R group of an amino acid?

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

What is the job of messenger RNA (mRNA)?

1. AIt stores genetic information in the nucleus permanently
2. BIt carries amino acids to the ribosomes
3. CIt carries the genetic code from DNA to the ribosomes
4. DIt forms the main structure of the ribosome

What is the main material in the cell wall of bacteria?

1. AKeratin
2. BPeptidoglycan
3. CCellulose
4. DChitin

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

1. Aالسيادة المشتركة
2. Bالسيادة غير التامة
3. Cصفة مرتبطة بالجنس
4. Dالسيادة التامة

Where does the oxygen released by photosynthesis come from?

1. AFrom water molecules that are split
2. BFrom carbon dioxide molecules that are split
3. CFrom chlorophyll that is used up
4. DFrom glucose that is broken down

How can bacteria pass antibiotic-resistance genes directly to other bacteria?

1. ABy meiosis, forming gametes with new alleles
2. BBy osmosis, moving genes in water
3. CBy conjugation, transferring plasmids through a pilus
4. DBy mitosis, sharing copies of their chromosomes with neighbours

A student puts a fertilised plant in a sunny window and an unfertilised plant in a dark cupboard. The fertilised plant grows more. What is the main flaw?

1. AThere was no hypothesis to test
2. BTwo variables were changed, so the cause is unclear
3. CThe student used too much fertiliser on the plant in the window
4. DThe dependent variable was not measured

Why does the influenza vaccine need to be updated most years?

1. AThe vaccine damages the immune system after one year, so it must be repeated
2. BAntibodies cannot be made against viruses
3. CInfluenza is caused by a different bacterium each year
4. DThe virus keeps changing its surface proteins through mutation