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

What is the main material in the cell walls of fungi?

1. ACellulose
2. BCollagen
3. CPeptidoglycan
4. DChitin

В каких единицах чаще всего выражают размер клетки?

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

What is the main material in the cell wall of bacteria?

1. AChitin
2. BPeptidoglycan
3. CCellulose
4. DKeratin

The sodium-potassium pump moves ions across the cell membrane. What does one cycle of the pump do?

1. AMoves 2 Na⁺ out and 3 K⁺ in, using ATP
2. BMoves 3 K⁺ out and 2 Na⁺ in, using ATP
3. CMoves 3 Na⁺ out and 2 K⁺ in, using ATP
4. DMoves Na⁺ in and K⁺ out, without using ATP

What happens when a ribosome reaches a stop codon on the mRNA?

1. AThe ribosome goes back to the start codon
2. BThe mRNA is copied back into DNA
3. CTranslation ends and the protein is released
4. DA special amino acid is added to end the chain

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

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

A solution contains 5 mg of a substance in every millilitre. How many milligrams are in 0,02 L of the solution?

1. A10 mg
2. B1000 mg
3. C100 mg
4. D0,1 mg

How does a phospholipid differ from a triglyceride?

1. AOne of the fatty acids is replaced by a phosphate group
2. BIt has four fatty acids instead of three
3. CIt is made of amino acids
4. DIt contains no glycerol, only fatty acids and phosphate