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

Which enzyme unwinds the DNA double helix and separates the two strands for copying?

1. AHelicase
2. BLigase
3. CLipase
4. DAmylase

In science, what is an observation?

1. AA rule that explains all known facts
2. BA guess about why something happens
3. CA conclusion drawn before any data are collected
4. DInformation gathered with the senses or instruments

Which list gives the main taxonomic ranks from broadest to most specific?

1. ASpecies, genus, family, order, class, phylum, kingdom, domain
2. BDomain, kingdom, phylum, class, order, family, genus, species
3. CKingdom, domain, class, phylum, family, order, species, genus
4. DDomain, phylum, kingdom, order, class, genus, family, species

What is a prion?

1. AA fungal spore that infects the brain
2. BA misfolded protein that causes normal proteins to misfold
3. CA bacterium without a cell wall that lives inside nerve cells
4. DA very small virus with a DNA genome

Nerve cells release chemical messengers (neurotransmitters) stored in vesicles. By which process are they released?

1. AExocytosis
2. BPhagocytosis
3. COsmosis
4. DEndocytosis

In a eukaryotic cell, where does transcription take place?

1. AIn the Golgi apparatus
2. BIn the lysosomes
3. COn ribosomes in the cytoplasm
4. DIn the nucleus

A plant cell is placed in a strong salt solution. Its membrane and cytoplasm pull away from the cell wall. What is this called?

1. APlasmolysis
2. BCrenation
3. CLysis
4. DTurgor

Fresh liver is dropped into hydrogen peroxide and bubbles form quickly. Boiled liver gives no bubbles. What is the best conclusion?

1. ABoiled liver contains more hydrogen peroxide than fresh liver
2. BHydrogen peroxide is broken down only by heat
3. CThe bubbles are carbon dioxide from respiration
4. DLiver contains an enzyme that is destroyed by boiling