ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

Which carbohydrate forms plant cell walls and acts as dietary fibre?

1. ACellulose
2. BGlycogen
3. CLactose
4. DGlucose

What does DNA replication produce?

1. ATwo identical DNA molecules
2. BA new protein
3. COne mRNA molecule
4. DFour different DNA molecules

What is endocytosis?

1. AMoving water across the membrane by osmosis
2. BReleasing material from the cell by fusing vesicles with the membrane
3. CSplitting the cytoplasm after the nucleus divides
4. DTaking material into the cell by folding the membrane around it

White blood cells called macrophages engulf and digest bacteria. Which organelle would you expect them to have in large numbers?

1. AChloroplasts
2. BLysosomes
3. CSmooth endoplasmic reticulum
4. DCentral vacuoles

A deletion removes exactly three bases, forming one whole codon, from the middle of a gene. What is the most likely result?

1. AThe protein becomes three times longer
2. BThe protein lacks one amino acid but the rest is unchanged
3. CEvery amino acid after the deletion is changed to a new one
4. DNo protein can be made at all

كيف تتكاثر البكتيريا عادةً؟

1. Aبإطلاق فيروسات بالتبرعم
2. Bبالانشطار الثنائي
3. Cبتكوين البذور
4. Dبالانقسام الاختزالي

A karyotype shows 45 chromosomes, with a single X chromosome and no Y. Which condition is this?

1. AA typical male karyotype
2. BTurner syndrome
3. CKlinefelter syndrome
4. DDown syndrome

Mature human red blood cells have no nucleus and no mitochondria. What follows from this?

1. AThey cannot divide and make their ATP by glycolysis only
2. BThey make ATP by aerobic respiration using the oxygen they carry
3. CThey keep making new haemoglobin throughout their life
4. DThey live longer than almost all other body cells