Describe two functions of enzymes

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

What is the next step in muscle contraction after the actin changes shape? (apex)

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?