True or False Questions

Purchase return and allowances is a contra account to purchases.

The repeating units that are used to form the helical DNA structure are called nucleotides.

Improving muscular strength and endurance slows bone density loss.

True, the given statement that Carbon in the ocean originates from the atmosphere is absolutely correct. Carbondi oxide in the atmosphere is absobed by the ocean surface and is dissolved as inorganic carbon in the oceans.

Secondhand smoke is very dangerous and creates serious health risks to you and your family members. 

Cytoplasm does not contains all the organelles.

The given statement that "Most pathogenic bacteria are thermophiles" is FALSE.

All enzymes are proteins but all proteins are not enzymes since, enzymes are subset of proteins.