*Question*
Answer the following question given this paragraph: The pyruvate molecules from glycolysis next enter the matrix of a mitochondrion. That's where the second stage of cellular respiration takes place. This stage is called the Krebs cycle . During this stage, two more molecules of ATP are produced. Other energy-storing molecules are also produced (to be used to make more ATP in stage 3). The Krebs cycle requires oxygen. Anything that needs oxygen is described as aerobic . The oxygen combines with the carbon from the pyruvate molecules. This forms carbon dioxide, a waste product. Q: What is the second stage of cellular respiration? Choices: - beatnik cycle - duocycle - marr cycle - krebs cycle A:
**Answer**
krebs cycle

*Question*
Answer the following question given this paragraph: Not all hydrogen atoms in molecular compounds are ionizable. In methane (CH 4 ), the hydrogen atoms are covalently bonded to carbon in bonds that are only slightly polar. The hydrogen atoms are not capable of ionizing and methane has no acidic properties. Acetic acid (CH 3 COOH) belongs to a class of acids called organic acids. There are four hydrogen atoms in the molecule, but only the one hydrogen that is bonded to an oxygen atom is ionizable. Q: Which class of acids acetic acid (ch 3 cooh) belongs to? Choices: - anorganic acids - strong acids - common acids - organic acids A:
**Answer**
organic acids

*Question*
Answer the following question given this paragraph: The central vacuole maintains turgor pressure against the cell wall. Q: The central vacuole maintains turgor pressure against what? Choices: - the cell move - the cell multiplication - the cell addition - the cell wall A:
**Answer**
the cell wall

*Question*
Answer the following question given this paragraph: If the egg is fertilized, the egg makes its way through the fallopian tube into the uterus, where it imbeds into the thick lining. When this occurs, the monthly cycle stops. The monthly cycle does not resume until the pregnancy is over. Q: In human beings, when a female becomes pregnant, what is fertilized and then embedded in the uterus? Choices: - dna - follicle - sperm - egg A:
**Answer**
egg