ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is activation energy?

1. AThe energy stored in a molecule of ATP
2. BThe energy plants take in from sunlight
3. CThe heat released when a reaction finishes
4. DThe energy needed to start a chemical reaction

In science, what is an observation?

1. AA guess about why something happens
2. BA conclusion drawn before any data are collected
3. CA rule that explains all known facts
4. DInformation gathered with the senses or instruments

What does sterilisation mean?

1. AReducing the number of microbes on the skin before an injection
2. BWashing away visible dirt with water
3. CKilling or removing all microorganisms, including spores
4. DKilling only the viruses on a surface

Why must human gametes be haploid?

1. ASo that the gametes can divide quickly by mitosis
2. BSo that the zygote has the normal number of 46 chromosomes
3. CSo that the zygote has twice the normal number of chromosomes
4. DSo that the gametes can make more proteins

ماذا تعني "ثنائية المجموعة الصبغية" (diploid)؟

1. Aللخلية مجموعة واحدة من الصبغيات
2. Bالخلية ليس لها نواة
3. Cللخلية مجموعتان من الصبغيات
4. Dيمكن للخلية أن تنقسم مرة واحدة فقط

To insert a human gene into a bacterial plasmid, scientists cut both the gene and the plasmid with the same restriction enzyme. Why?

1. ASo the cut ends match and can join together
2. BSo the plasmid loses all its genes
3. CSo both pieces become exactly the same length
4. DSo the gene is turned into RNA

Why can standard DNA profiling not tell identical twins apart?

1. AIdentical twins have no non-coding DNA
2. BTwins always share the same fingerprints on their hands
3. COnly one twin inherits the father's DNA
4. DIdentical twins come from one zygote and have the same DNA

A single-celled microbe has a nucleus and a cell wall made of chitin, and it reproduces by budding. What is it most likely to be?

1. AA virus
2. BA bacterium
3. CAn amoeba
4. DA yeast