ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What do receptor proteins in the cell membrane do?

1. AThey store the cell's genetic code for making proteins
2. BThey make ATP for the cell
3. CThey bind specific signal molecules, such as hormones
4. DThey digest bacteria that enter the cell

Who first worked out the basic rules of inheritance by breeding pea plants?

1. AGregor Mendel
2. BLouis Pasteur
3. CCharles Darwin
4. DRobert Hooke

What is a Punnett square used for?

1. ACounting the chromosomes in a cell
2. BPredicting the possible genotypes of offspring
3. CShowing the order of genes on a chromosome
4. DMeasuring the size of a cell

Golden rice was genetically modified to make beta-carotene. What is the aim?

1. ATo help prevent vitamin A deficiency
2. BTo make the rice resistant to all insects
3. CTo make the rice grow faster in cold climates
4. DTo increase the protein content of the rice

In which phase of mitosis do the chromosomes condense and the nuclear envelope break down?

1. AMetaphase
2. BTelophase
3. CProphase
4. DAnaphase

In a food chain, which organisms are the producers?

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

Cells lining the small intestine have tiny finger-like folds of membrane called microvilli. What does this tell you about their job?

1. AThey make digestive enzymes in large amounts
2. BThey move food along by beating like cilia
3. CThey absorb substances, so they need a large surface area
4. DThey protect the gut from bacteria by producing mucus

Bacteria from hot springs have enzymes that work best at about 80 °C, while most human enzymes work best near 37 °C. What is the best explanation?

1. ATheir enzymes are made of lipids, not proteins
2. BTheir enzymes have structures that stay stable at high temperatures
3. CHigh temperature never affects any enzyme
4. DTheir enzymes do not have an active site, so heat cannot affect them