Biochemistry

What are the building blocks of proteins?

Answer explanation

The building blocks of proteins are amino acids. These organic compounds combine in various sequences to form proteins, which are essential for numerous biological functions.

What is the primary function of enzymes, which are a type of protein?

Answer explanation

The primary function of enzymes, which are a type of protein, is to act as catalysts that speed up chemical reactions in the body without being consumed in the process.

What dictates the function of a protein?

Answer explanation

The function of a protein is dictated by its amino acid sequence, which determines its three-dimensional structure. This structure ultimately influences how the protein interacts with other molecules and performs its biological role.

How can proteins be denatured?

Answer explanation

Proteins can be denatured by exposure to heat, pH changes, or chemicals, which disrupt their structure, leading to loss of function. This process alters the protein's shape, affecting its biological activity.

Give an example of a structural protein and its role.

Answer explanation

Collagen is a structural protein that provides strength and support to connective tissues, skin, and bones, playing a crucial role in maintaining the integrity and elasticity of these structures.

James is learning about nutrition in his health class. His teacher asks him to identify the two main types of carbohydrates found in foods. What are they?

• Simple carbohydrates (sugars)

• Complex carbohydrates (starches)

Answer explanation

The two main types of carbohydrates are simple carbohydrates, which are sugars, and complex carbohydrates, which are starches. Both play essential roles in nutrition.

What is the primary function of lipids in the body?

Answer explanation

The primary function of lipids in the body is to store energy, provide insulation, and form cell membranes, which are essential for maintaining cellular structure and function.

What is a catalyst?

Answer explanation

A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. It lowers the activation energy required, allowing reactions to occur more easily and quickly.

Describe the 'lock and key' model of enzyme action.

Answer explanation

The 'lock and key' model describes how enzymes (the 'lock') are specific to substrates (the 'key'). The substrate fits perfectly into the enzyme's active site, facilitating a biochemical reaction, similar to how a key fits into a lock.

What factors can affect enzyme activity?

Answer explanation

Enzyme activity can be affected by factors such as temperature, pH, substrate concentration, and the presence of inhibitors or activators, which can alter the enzyme's shape and function.