Q: What simple machine consists of a bar that rotates around a fixed point called the fulcrum? Choices: - battering ram - rotor - catapult - lever A:
lever

(Question)
Q: Insulin is made up of how many polypeptide chains? Choices: - three - four - twelve - two A:
(Answer)
two

Ques: Q: What are proteins that increase the rate of biochemical reactions? Choices: - metabolites - hormones - amino acids - enzymes A:
Ans: enzymes

(Q).
Q: Skeletal, cardiac, and smooth are the three types of what cells and possess morphologies correlated with their functions? Choices: - cartilage tissue - organ - bone - muscle A:
(A).
muscle

Ques:Q: Vitamins are organic compounds that are essential in very small amounts for the maintenance of normal what? Choices: - respiration - pigments - calcium - metabolism A:

Ans:metabolism

Ques: Q: What are elements that generally do not conduct electricity? Choices: - copper - metal - iron - nonmetals A:
Ans:
nonmetals