Cellular Resp/ Ana And Cata

Question 1

Cellular respiration

Answer 1

Is when organic molecules (glucose) are broken down in cells to release ATP (energy for cell activity eg. Cell division, DNA replication and cell maintenance.

Question 2

Aerobic

Answer 2

Step 1: GLYCOLYSIS- glucose breaks down to form Pyruvic acid (glucose->2ATP + lactic acid) occurs in cytoplasm
Step 2: KREBS CYCLE- pyruvic acid breaks down, forms 2 ATP. In mitochondria. Requires oxygen
Step 3: ELECTRON TRANSPORT SYSTEM- products of kerb cycle. Forms 34 atp. 38 in total is released.

Question 3

Anaerobic

Answer 3

Glycolysis occurs as normal as there is no oxygen required for this step. Glucose->2ATP + lactic acid
There is an oxygen dept (eg. Running etc), so the body takes O2 from H2O in blood. Lactic acid goes to liver and recombined with liver to reform pyruvic acid

Question 4

Anabolic

Answer 4

Simple substances are built up to more complex ones. Ana= block
Eg. Protein synthesis , DNA replication, making hormones, skin, muscles. NEEDS energy

Question 5

Catabolic

Answer 5

Destructive metabolic process. Complex substances broken down to simpler ones. RELEASES energy. Eg. Cellular respiration, chemical digestion, breakdown of fat to glucose