Scheda di esercizi di Biologia per i test di ammissione a infermieristica con soluzioni

What is a heterotroph?

1. AAn organism that gets its food from other organisms
2. BAn organism with no cells
3. CAn organism that makes its own food by photosynthesis
4. DAn organism that lives only in water

Which group of biomolecules forms the basic bilayer of the cell membrane and also stores long-term energy?

1. ACarbohydrates
2. BNucleic acids
3. CLipids
4. DProteins

Which carbohydrate forms plant cell walls and acts as dietary fibre?

1. ACellulose
2. BGlucose
3. CLactose
4. DGlycogen

A tall pea plant could be TT or Tt. Which cross will best reveal its genotype?

1. ACross it with a TT plant
2. BCross it with another tall plant
3. CLet it grow for a longer time
4. DCross it with a short (tt) plant

Which kind of mutation can be passed on to a person's children?

1. AA mutation in a cell that forms eggs or sperm
2. BA mutation in a skin cell caused by sunlight
3. CA mutation in a liver cell caused by alcohol
4. DA mutation in a white blood cell during infection

In che cosa i grassi saturi differiscono da quelli insaturi?

1. ASi sciolgono facilmente in acqua
2. BContengono azoto e formano proteine
3. CHanno molti doppi legami e sono liquidi a temperatura ambiente
4. DNon hanno doppi legami C=C e di solito sono solidi

The rate of an enzyme reaction rises as substrate is added but then levels off, even when more substrate is added. Why?

1. AThe products have turned back into substrate
2. BAll the active sites are occupied
3. CThe substrate has become an inhibitor
4. DThe enzyme has been denatured

At dawn, a plant shows no overall uptake or release of oxygen or carbon dioxide. What is the best explanation?

1. AIt has stopped both photosynthesis and respiration until it is light
2. BIts stomata are permanently closed at dawn
3. CIts rate of photosynthesis equals its rate of respiration
4. DIt only respires at dawn