Biomolecules and Protein Flashcard GGN

Front

What is the main function of a carbohydrate?

Back

Short term energy (ATP)

Answer explanation

Carbohydrates primarily serve as a source of short-term energy (ATP) for the body. They are quickly metabolized to provide immediate energy, unlike fats which are used for long-term energy storage.

Front

The main function of lipids are:

Back

Long term energy (ATP)

Answer explanation

Lipids primarily serve as long-term energy storage in the form of fats, providing a dense source of energy (ATP) for the body. They are not involved in genetic material storage or short-term energy.

Front

Which of the following would be a food source of protein? Oil, Strawberries, Lettuce, Poultry

Back

Poultry

Answer explanation

Poultry is a rich source of protein, essential for building and repairing tissues. In contrast, oil, strawberries, and lettuce contain minimal to no protein.

Front

What is the purpose of an enzyme?

Back

speed up reactions

Answer explanation

The primary purpose of an enzyme is to speed up reactions by lowering the activation energy required for the reaction to occur, making processes more efficient.

Front

How do enzymes increase the rate of a chemical reaction within a living cell?

Back

reducing the activation energy

Answer explanation

Enzymes increase the rate of chemical reactions by reducing the activation energy required for the reaction to occur, making it easier for reactants to convert into products.

Front

Which conclusion can be drawn from this graph?

Back

The optimum pH of the enzyme is 6.6.

Answer explanation

The graph indicates that the enzyme's activity peaks at a pH of 6.6, confirming it as the optimum pH. Other options either misstate the optimum pH or do not accurately reflect the enzyme's activity across the pH range.

Front

The "lock and key hypothesis" attempts to explain the mechanism of?

Back

Enzyme specificity

Answer explanation

The "lock and key hypothesis" describes how enzymes are specific to their substrates, fitting together like a key in a lock. This model illustrates the precise interaction necessary for enzyme activity, making "enzyme specificity" the correct choice.

Front

An enzyme speeds up a chemical reaction in the cell but can only be used once. True or False?

Back

false

Answer explanation

The statement is false because enzymes can be used multiple times in a reaction. They are not consumed in the reaction and can catalyze the same reaction repeatedly.

Front

The pH at which an enzyme is most efficient is called the _________ pH of an enzyme.

Back

optimum

Answer explanation

The pH at which an enzyme is most efficient is referred to as the optimum pH. This is the specific pH level that allows the enzyme to function at its highest activity.

Front

What is the following molecule?

Back

Nucleic Acid

Answer explanation

The molecule in question is a nucleic acid, which includes DNA and RNA. These macromolecules are essential for storing and transmitting genetic information, distinguishing them from carbohydrates, lipids, and proteins.