Biological Molecules and Enzyme Functions

The video provides feedback on an assessment covering cells and biological molecules. It discusses comprehension questions, the properties of hemi cellulose, enzyme specificity, DNA nucleotides, and enzyme action. The breakdown of starch by amylase and graph analysis are also covered, along with the effects of incubation time on reaction rates. The video concludes with a discussion on omega-3 and phosphate attachment in molecules.

What is hemicellulose primarily composed of?

• Pentose sugars

• Hexose sugars

• Fatty acids

• Amino acids

Why can't lignin fit into the active site of cellulase?

• Lignin is too small

• Lignin has a different shape

• Lignin is not a carbohydrate

• Lignin is not a polymer

Which enzyme is responsible for adding nucleotides during DNA replication?

• RNA polymerase

• Ligase

• DNA polymerase

• DNA helicase

What is the role of DNA helicase in DNA replication?

• Adding nucleotides

• Joining DNA fragments

• Unzipping the DNA strands

• Repairing DNA

What is the significance of DNA's antiparallel structure?

• It allows for DNA to be single-stranded

• It enables DNA to be more flexible

• It facilitates the correct pairing of nucleotides

• It prevents DNA from being replicated

What happens to the rate of reaction as the substrate concentration decreases?

• It increases

• It remains constant

• It decreases

• It becomes zero

What is the effect of high temperatures on enzyme activity?

• Enzymes denature

• Enzymes are unaffected

• Enzymes replicate

• Enzymes become more active

What is the main function of amylase in starch breakdown?

• Converting starch to glucose

• Converting starch to maltose

• Converting starch to cellulose

• Converting starch to protein

What is the primary reason for the decrease in omega-3 levels in wild fish?

• Less fat in diet

• Higher fat content in diet

• Increased protein intake

• Decreased carbohydrate intake

Why is it important for phosphates to attach to carbon 5 in nucleotides?

• To ensure correct DNA replication

• To allow for proper bonding

• To stabilize the nucleotide

• To prevent denaturation