Ques: Q: Hiv has proteins called what, internal to the envelope, which help stabilize virion shape? Choices: - reduction proteins - step proteins - sphere proteins - matrix proteins A:
Ans: matrix proteins

Ques: Q: What type of fibers are made mostly of protein in living things? Choices: - organ fibers - liver fibers - connective tissue fibers - muscle fibers A:
Ans: muscle fibers

Ques: Q: What organism are resistant to freezing and drying and also are metabolically inactive? Choices: - giardia - spirogyra - trichina - zygosporangia A:
Ans: zygosporangia

Ques: Q: The number of valence electrons determines variation of what property in nonmetals? Choices: - permeability - density - turbidity - reactivity A:
Ans:
reactivity