AP BIOLOGY

Detailed explanation-1: -Glycolysis, which is the first step in all types of cellular respiration is anaerobic and does not require oxygen. If oxygen is present, the pathway will continue on to the Krebs cycle and oxidative phosphorylation. However, if oxygen is not present, some organisms can undergo fermentation to continually produce ATP.

Detailed explanation-2: -In organisms that perform cellular respiration, glycolysis is the first stage of this process. However, glycolysis doesn’t require oxygen, and many anaerobic organisms-organisms that do not use oxygen-also have this pathway.

Detailed explanation-3: -Glycolysis does not require oxygen and occurs during both aerobic and anaerobic respiration. If there is oxygen available, aerobic respiration can occur and the pyruvate molecules produced at the end of glycolysis will be transported to the mitochondria to enter the citric acid cycle.

Detailed explanation-4: -Glycolysis requires specific ingredients to work. The inputs of glycolysis include a living cell, enzymes, glucose and the energy transfer molecules nicotinamide adenine dinucleotide (NAD+) and adenosine triphosphate (ATP).