Question

1. functions of proteins

a. proteins have diverse functions in the body.
b. they help to transport molecules like type answer here within red blood cells.
c. proteins also regulate the speed of chemical reactions.
d. antibodies are proteins that help to type answer here the body against foreign substances.

Explanation:

Identify the transport protein in red blood cells

The first blank asks for a molecule transported by proteins within red blood cells. Red blood cells contain the specialized transport protein hemoglobin, which binds and transports oxygen (\(\text{O}_2\)) throughout the body. Therefore, the most appropriate term to fill in this blank is "oxygen". This relates directly to the student's mastered concept of Protein Function.

Identify the function of antibodies

The second blank asks for the role of antibodies in protecting the body against foreign substances. Antibodies are protective proteins produced by the immune system that bind to foreign invaders (like pathogens) to neutralize them or mark them for destruction. The verb that fits the context "help to [blank] the body against foreign substances" is "defend" or "protect". This also demonstrates the diverse roles of Proteins in biological systems.

Answer:

Question 1

b. They help to transport molecules like <blank>oxygen</blank> within red blood cells.

Question 2

d. Antibodies are proteins that help to <blank>defend</blank> the body against foreign substances.