ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

In an enzyme reaction, what is the substrate?

1. AThe substance that the enzyme acts on
2. BThe gene that codes for the enzyme
3. CThe product released at the end
4. DThe part of the enzyme that changes shape

What is a eukaryote?

1. AAn organism that lives only in extreme heat
2. BAn organism whose cells have a nucleus
3. CAn organism made of a single cell without a nucleus
4. DA virus that infects animal cells

What are cilia?

1. ASmall round sacs that hold digestive enzymes
2. BOpenings in the nuclear envelope
3. CFolds of the inner mitochondrial membrane that make ATP
4. DShort hair-like projections that beat in waves

A patient's heart rate is measured four times: 70, 72, 74 and 80 beats per minute. What is the mean?

1. A74 beats per minute
2. B72 beats per minute
3. C80 beats per minute
4. D73 beats per minute

ما الطفرة؟

1. Aتغيّر في عدد الخلايا في نسيج
2. Bالنسخ الطبيعي لـ DNA قبل الانقسام
3. Cتغيّر في تتابع قواعد DNA
4. Dاقتران الصبغيات المتماثلة

What happens to a protein when it is denatured?

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

Home pregnancy tests use antibodies that bind the hormone hCG. Why do they react with hCG and not with other proteins in urine?

1. AThe hormone hCG is a type of antibody itself
2. BAntibodies bind every protein but change colour only with hCG
3. CUrine contains no other proteins at all
4. DEach antibody binds a specific antigen shape

During the Industrial Revolution, soot darkened tree trunks in parts of England, and dark peppered moths became more common than pale ones. What best explains this?

1. AThe soot settled on the pale moths and slowly turned them dark
2. BDark moths were produced by the polluted air
3. CThe moths chose to become dark to hide
4. DBirds found and ate fewer dark moths on the dark trunks