Animals produce most of their nitrogen-containing wastes during

1. Animals produce most of their nitrogen-containing wastes during
A. Protein digestion
B. Carboyhydrate digestion
C. Lipid digestion
D. Glycogen synthesis
E. Production of chemiosmotic gradients

All protein amino acids contain amine groups which have nitrogen...

2. Which of the following is the most abundant carbon-containing compound in the atmosphere?
A. carbon monoxide B. Carbon dioxide C. Carbon tetrachlordie D. Ethane E. Ozone

This is one of the most abundant green house gases in the atmosphere. It is produced during cellular respiration in almost all living species.

3. Which of the following carbon compounds is standardly utilized as an energy source by heterotrophs?
A. calcium carbonate B. carbonic acid. C. organic molecules D. Carbon dioxide E. carbon monoxide.

Organic molecules, such as fats, contain carbon-carbon bonds that, when broken, can release energy.

4. Which of the following is responsible for the cohesive property of water?
A. H-bonds btwn the Oxygen atoms of 2 adjacent water molecules
B. Covalent bonds btwn hydrogen atoms of 2 adjacent water molecules
C. H-bonds btwn oxygen atom of 1 water molecule and a hydrogen atom of another water molecules
D. Covalent bonds btwn the oxygen atom of 1 water molecule and a hydrogen atom ofa nother water molcule
E. H bonds betwn water molecules and other types of molecules

H-Bonds between oxygen and hydrogen allow for water molecules to stick together.