Биология для вступительных экзаменов на сестринские программы: лист заданий с ответами

В каких единицах чаще всего выражают размер клетки?

1. AВ километрах (км)
2. BВ метрах (м)
3. CВ микрометрах
4. DВ литрах (л)

What is a zygote?

1. AThe diploid cell formed when a sperm fertilises an egg
2. BA body cell that has just completed its first round of mitosis
3. CA haploid cell made by meiosis
4. DAn unfertilised egg cell

What is an organism's genotype?

1. AThe alleles it carries for a trait
2. BThe environment in which it lives
3. CThe number of cells in its body
4. DThe traits that can be seen or measured

Which element is found in all amino acids but not in carbohydrates?

1. AHydrogen
2. BOxygen
3. CCarbon
4. DNitrogen

A deletion removes exactly three bases, forming one whole codon, from the middle of a gene. What is the most likely result?

1. AEvery amino acid after the deletion is changed to a new one
2. BNo protein can be made at all
3. CThe protein becomes three times longer
4. DThe protein lacks one amino acid but the rest is unchanged

What does the enzyme lipase break down?

1. AStarch into sugars
2. BProteins into amino acids and peptides
3. CFats into fatty acids and glycerol
4. DDNA into nucleotides

In an onion root tip, 90 of 100 cells are in interphase and 10 are in mitosis. If the whole cell cycle takes 20 hours, about how long does mitosis last?

1. A0,5 hours
2. B2 hours
3. C10 hours
4. D18 hours

After a meal, blood glucose rises. Which response brings it back to normal?

1. AThe pancreas releases glucagon, and the liver releases glucose
2. BThe kidneys release insulin into the urine
3. CThe liver stops storing glycogen and releases more glucose
4. DThe pancreas releases insulin, and cells take up glucose