ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

أي وحدة تُستخدم غالبًا للتعبير عن حجم الخلية؟

1. Aاللترات (L)
2. Bالأمتار (m)
3. Cالكيلومترات (km)
4. Dالميكرومترات

Which enzyme adds new nucleotides to build a new DNA strand?

1. AHelicase
2. BPepsin
3. CDNA polymerase
4. DRNA polymerase

Which definition of a species is most often used for animals?

1. AAll of the different organisms that live together in one area
2. BAll the animals that eat the same food
3. CA group that can interbreed and have fertile offspring
4. DAny organisms that look alike

What is the role of cholesterol in animal cell membranes?

1. AIt forms a rigid wall around the cell
2. BIt stores the cell's genetic information
3. CIt carries glucose molecules across the membrane into the cell
4. DIt keeps membrane fluidity stable as temperature changes

What happens to a protein when it is denatured?

1. AIt becomes more active than before
2. BIt loses its 3D shape but keeps its amino acid sequence
3. CIt loses some of its amino acids but keeps its folded shape
4. DIt turns into a carbohydrate

What is the difference between an antiseptic and a disinfectant?

1. AAntiseptics are used on objects and floors; disinfectants are used on skin
2. BAntiseptics kill all spores; disinfectants kill none
3. CAntiseptics are antibiotics; disinfectants are vaccines
4. DAntiseptics are used on living tissue; disinfectants are used on objects

يقرأ كودون في mRNA الشفرة AUG. ما الكودون المضاد في tRNA المقابل؟

1. AAUG
2. BUAC
3. CTAC
4. DGUA

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