basic definitions (lvl1

Question 1

metabolism, metabolic pathways

Answer 1

Metabolism is the complex network of interdependent and interacting chemical reactions that occur in living organisms. Metabolic pathways can be either cyclical or linear.

Question 2

metabolic reactions (c,a)

Answer 2

Metabolic reactions can be either anabolic or catabolic reactions. Anabolic reactions build up big molecules from smaller ones and need energy in the process. Catabolic reactions break down big molecules into smaller ones and release energy in the

Question 3

enzymes

Answer 3

Enzymes are globular proteins that act as catalysts with an active site.
Enzymes can be denatured by extreme temperatures and pH.
Enzymes increase the rate of metabolic reaction by lowering the activation energy of the reaction.
Enzymes are specific and can only bind to one substrate or a range of similar substrates.
Enzyme activity can be affected by pH, temperature and substrate concentration, and the reaction rate can be determined and compared through experimentation.

Question 4

substrates

Answer 4

Reactants in metabolic reactions are called substrates and they bind specifically to the active site. Collisions between the substrate and the active site are important for the catalysis to take place.

Question 5

enzyme inhibition hl

Answer 5

The activity of the enzymes can be inhibited through competitive, non-competitive, end-product inhibition and mechanism-based inhibition.
Enzymes can either act intracellularly (inside cells) or extracellularly (outside the cells).