Protein Structure and Function Concepts

The video tutorial focuses on proteins, one of the four types of organic molecules. It explains the role of proteins in various cellular functions, such as photosynthesis, cellular respiration, DNA replication, transcription, and translation. The structure of amino acids and the formation of polypeptides are discussed, highlighting how proteins are synthesized. The video also covers the role of enzymes in lowering the energy needed for chemical reactions, their specificity, and sensitivity to environmental changes.

Which of the following is NOT a function of proteins in cellular processes?

• DNA replication

• Cellular respiration

• Photosynthesis

• Photosynthesis of lipids

What is the basic building block of proteins?

• Monosaccharides

• Amino acids

• Fatty acids

• Nucleotides

How many different types of amino acids are there?

• 10

• 25

• 20

• 15

What determines the specific function of a protein?

• The amount of glucose

• The presence of lipids

• The sequence of amino acids

• The number of polypeptides

What is the consequence of a single amino acid change in a protein?

• Decreased protein size

• Potentially drastic impacts

• Increased protein size

• No effect

What type of reaction forms peptide bonds between amino acids?

• Oxidation

• Dehydration synthesis

• Hydrolysis

• Reduction

What is the role of enzymes in chemical reactions?

• Change reaction products

• Stop reactions

• Lower energy requirements

• Increase energy requirements

Which of the following is true about enzymes?

• They work better at high temperatures

• They are sensitive to environmental changes

• They are not reusable

• They are not specific

What suffix is commonly found in enzyme names?

• OSE

• ASE

• INE

• IDE

What happens to enzymes at high temperatures?

• They become more active

• They lose their function

• They change their specificity

• They become more stable