1. a). Proteins and carbohydrates have the same caloric content, ounce for ounce

Question

1.

a). Proteins and carbohydrates have the same caloric content, ounce for ounce.

True

False

b). The product of an enzymatic reaction is called the substrate

True

False

c). Fermentation is the default system for eukaryotic organisms when oxygen is present

True

False

d). Which of the following is NOT true of enzymes

I). Each one is non-speciifc, and can be used for many different chemical reactions

II). They are almost always proteins

III). Changes in pH or temperature can affect their conformation and activity

IV). They are not used up in chemical reactions, but are able to catalyze many reactions in a row

e). Which is required for fermentation to occur in yeast?

I). A carbon source, oxygen, and enzymes

II). oxygen and substrates

III). A carbon source, enzymes and substrates, and an oxygen free environment

IV). A carbon source, methane, and enzymes

Explanation / Answer

1a) proteins and carbohydrate have same coloric content ounce per ounce is false .because 4 calories per gram is required.

2b) The product of enzymatic reaction is substrate is true

Explanation: Enzymes are macromolecules biological catalysts.Enzymes accelerates or catalyst chemical reaction.the molecule at the beginning of the process upon which enzymes may act are called substrates and enzymes converts there into different molecules called products.

1c) false explanation : Some prokaryotes and eukaryotes use anaerobic respiratory which can create energy for use in absence of oxygen.

1d) each one is non specific and use in chemical reaction is not true in case of enzymes.

1e) Fermentation occurs incase yeast required

Oxygen and substrate Explanation :In addition to oxygen they require basic substrate such as sugars . some yeast can convert sugar to alcohol ,and carbondioxide in absence of air but requires oxygen for growth

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