ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is an organism's genome?

1. AA single gene on one chromosome
2. BThe traits that can be seen
3. CAll of its genetic material
4. DThe proteins made by one cell

Which feature helps a sperm cell carry out its job?

1. AA cell wall for protection
2. BA large vacuole for storing water
3. CChloroplasts for making food
4. DA flagellum for swimming

In an enzyme reaction, what is the substrate?

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

What happens to a protein when it is denatured?

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

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

1. A80 beats per minute
2. B74 beats per minute
3. C72 beats per minute
4. D73 beats per minute

Researchers randomly assign patients to receive either a new wound dressing or the standard dressing and compare healing times. What type of study is this?

1. AAn observational study
2. BA controlled experiment
3. CA case report
4. DA survey

Some snakes and whales have tiny remains of hip bones that are not used for walking. What do these structures suggest?

1. AThey were caused by a recent mutation
2. BThey will grow legs in the future
3. CTheir ancestors had legs
4. DThe bones are needed for swimming

Ignoring crossing over, how many different combinations of chromosomes can one person's gametes have because of independent assortment?

1. A2 × 23, which is 46
2. B2²³, about 8 million
3. C46, one for each chromosome
4. D23², about 529