Biology Concepts: Enzymes and Amino Acids

This video tutorial explores proteins, one of the four types of organic molecules. It covers their role in various cellular functions, including photosynthesis, cellular respiration, DNA replication, transcription, and translation. The structure of proteins is explained, focusing on amino acids and polypeptides. The video also delves into enzymes, a type of protein, highlighting their function in lowering energy for chemical reactions, their specificity, and reusability.

Which of the following is NOT a basic reactant required for photosynthesis?

• Water

• Oxygen

• Carbon Dioxide

• Sunlight

What is the primary function of mitochondria in cellular respiration?

• To generate ATP

• To produce glucose

• To break down proteins

• To store energy

During DNA replication, what is the role of proteins?

• To transport oxygen

• To synthesize lipids

• To copy DNA molecules

• To break down glucose

What is the process called where RNA is created from DNA?

• Photosynthesis

• Replication

• Transcription

• Translation

What is a polypeptide?

• A single amino acid

• A chain of amino acids

• A type of lipid

• A carbohydrate

How many different kinds of amino acids are there?

• 10

• 15

• 20

• 25

What is the main function of enzymes in chemical reactions?

• To slow down reactions

• To increase energy requirements

• To lower energy requirements

• To change the reaction products

Which suffix is commonly found at the end of enzyme names?

• -ase

• -ate

• -ine

• -ose

What happens to enzymes when they are exposed to high temperatures?

• They change their structure

• They become more active

• They multiply

• They lose their function

Why are enzymes considered reusable?

• They are destroyed after use

• They can be used multiple times

• They are only used in one reaction

• They can be used once