Biology for nursing entrance exams worksheet with answers

Which type of microscope is needed to see a virus?

1. AA light microscope
2. BA magnifying glass
3. CA dissecting microscope
4. DAn electron microscope

What does it mean that a cell membrane is selectively permeable?

1. AIt lets no substance cross at all
2. BIt lets only water molecules cross
3. CIt lets every substance cross freely in both directions
4. DIt lets some substances cross but not others

What is apoptosis?

1. AUncontrolled cell division
2. BFusion of two gametes
3. CProgrammed cell death
4. DDivision of the cytoplasm

Why do many plants close their stomata on hot, dry days?

1. ATo release more oxygen
2. BTo speed up photosynthesis
3. CTo take in more carbon dioxide
4. DTo reduce water loss

Why is a buffer system important in blood?

1. AIt raises the blood glucose level
2. BIt resists changes in pH
3. CIt carries oxygen to the tissues
4. DIt makes the blood clot faster

Why does PCR use a DNA polymerase taken from bacteria that live in hot springs?

1. AIt works only in the dark, like the bacteria it comes from
2. BIt copies RNA as well as DNA
3. CIt survives the high temperatures used to separate the strands
4. DIt makes the DNA strands stick together

Cells of the pancreas make and secrete large amounts of digestive enzymes. Which organelles would be especially well developed?

1. ASmooth endoplasmic reticulum, chloroplasts and the large vacuole
2. BRough endoplasmic reticulum and Golgi apparatus
3. CLysosomes and the cell wall
4. DChloroplasts and the cell wall

Which of these is a testable hypothesis?

1. APlants should be watered by caring people
2. BPlants are the most beautiful living things
3. CPlants feel happier and calmer when people talk to them every day
4. DIf plants get more light, they will grow taller