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

What is the job of messenger RNA (mRNA)?

1. AIt forms the main structure of the ribosome
2. BIt stores genetic information in the nucleus permanently
3. CIt carries the genetic code from DNA to the ribosomes
4. DIt carries amino acids to the ribosomes

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

1. AAmylase
2. BHelicase
3. CLipase
4. DLigase

Which gas do plants take in from the air for photosynthesis?

1. AHydrogen
2. BNitrogen
3. COxygen
4. DCarbon dioxide

White blood cells called macrophages engulf and digest bacteria. Which organelle would you expect them to have in large numbers?

1. ACentral vacuoles
2. BSmooth endoplasmic reticulum
3. CLysosomes
4. DChloroplasts

Which statement about Archaea is correct?

1. AThey are prokaryotes, and many live in extreme environments
2. BThey are eukaryotes that have a nucleus and membrane-bound organelles
3. CThey are multicellular plants
4. DThey are a type of virus

Which body system works with the respiratory system to deliver oxygen to body cells?

1. AThe digestive system
2. BThe circulatory system
3. CThe urinary system
4. DThe skeletal system

A farmer's crops grow poorly in soil lacking nitrates. Why do plants need nitrogen?

1. ATo make glucose during photosynthesis
2. BTo make amino acids, proteins and nucleic acids
3. CTo build cellulose cell walls
4. DTo absorb more carbon dioxide through the stomata

In snapdragons, flower colour shows incomplete dominance: RR is red, RW is pink and WW is white. Two pink plants are crossed. What phenotype ratio is expected?

1. A1 red : 1 white
2. BAll pink, like the parents
3. C1 red : 2 pink : 1 white
4. D3 red : 1 white