Робочий аркуш «Біологія для вступних іспитів на медсестринство» з відповідями

Which enzyme adds new nucleotides to build a new DNA strand?

1. ADNA polymerase
2. BHelicase
3. CRNA polymerase
4. DPepsin

Which codon signals the start of translation in most genes?

1. AUAA
2. BUAG
3. CAUG
4. DUGA

Що таке залежна змінна в експерименті?

1. AБудь-який чинник, що залишається сталим
2. BЧинник, який дослідник свідомо змінює
3. CГіпотеза, яку перевіряють
4. DЧинник, який вимірюють, щоб побачити результат дії

Yeast in bread dough breaks down sugar without oxygen. What does it produce?

1. AGlucose and oxygen
2. BLactic acid and carbon dioxide
3. COxygen and water
4. DEthanol and carbon dioxide

Which sequence describes the usual flow of genetic information in a cell?

1. ADNA to RNA to protein
2. BDNA to protein to RNA
3. CRNA to DNA to protein
4. DProtein to RNA to DNA

What is the role of ribosomal RNA (rRNA)?

1. AIt forms part of the ribosome and helps join amino acids
2. BIt stores genetic information in the nucleus
3. CIt carries the code from DNA to the ribosome
4. DIt brings single amino acids to the ribosome

An inhibitor binds to an enzyme away from the active site and changes the enzyme's shape. Adding more substrate does not restore the rate. What type of inhibition is this?

1. ACompetitive inhibition
2. BNoncompetitive inhibition
3. CSubstrate saturation
4. DDenaturation by heat

Liver cells take in cholesterol-carrying LDL particles only after the particles bind to specific proteins on the cell surface. Which process is this?

1. ASimple diffusion
2. BReceptor-mediated endocytosis
3. CExocytosis
4. DPinocytosis of extracellular fluid