ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is a chromosomal deletion?

1. AThe swap of a single DNA base
2. BThe loss of a piece of a chromosome
3. CA piece of chromosome that is turned around
4. DAn extra copy of a whole chromosome

What is the SI base unit of mass?

1. ALitre
2. BGram
3. CKilogram
4. DPound

What is a pedigree in genetics?

1. AA chart that shows how a trait is inherited in a family
2. BA picture of a person's chromosomes arranged in pairs by size
3. CA table of codons and amino acids
4. DA list of all the genes in an organism

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

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

In a food chain, which organisms are the producers?

1. AFungi that break down dead material
2. BPlants and algae that make food by photosynthesis
3. CAnimals that eat only plants, such as rabbits and deer
4. DPredators at the top of the chain

How does facilitated diffusion differ from active transport?

1. AIt moves only water and no other substances
2. BIt needs no energy and moves substances down their gradient
3. CIt needs ATP and moves substances against their gradient
4. DIt works without any membrane proteins

يبيّن رسم بياني أن نشاط إنزيم يرتفع من 20 °C إلى ذروة عند 37 °C ثم ينخفض بحدة. ما أفضل تفسير؟

1. Aيعمل الإنزيم أفضل ما يكون عند 20 °C ويتلف عند 37 °C
2. Bالمثلى نحو 37 °C؛ والحرارة الأعلى تمسخه
3. Cلا أثر لدرجة الحرارة في نشاط الإنزيم
4. Dيواصل الإنزيم التسارع كلما ارتفعت الحرارة

Cystic fibrosis is caused by a faulty CFTR protein, which forms a chloride channel in the cell membrane. Which process is directly affected?

1. AMovement of chloride ions through a membrane protein
2. BDiffusion of oxygen molecules through the lipid bilayer
3. CCopying of DNA in the nucleus
4. DProduction of ATP in the mitochondria