Question

question 8 of 10
a teacher claims that the carbon in starch molecules comes from molecules made by photosynthesis. the images show models of a glucose molecule and a starch molecule.
glucose
starch
which statement uses evidence from the images to support the teachers claim?
a. glucose molecules and starch have different ratios of carbon, hydrogen, and oxygen atoms.
b. oxygen and hydrogen atoms are arranged the same way in starch and in glucose.
c. the carbon in glucose and the carbon in starch come from two different reactants of photosynthesis.
d. carbon is used to make glucose during photosynthesis, and many glucose molecules are joined to make a starch molecule.

Explanation:

The teacher claims carbon in starch comes from photosynthesis - made molecules. Glucose is made during photosynthesis and starch is a polymer of glucose. Option D states carbon is used to make glucose in photosynthesis and many glucose molecules join to form starch, which supports the teacher's claim using the relationship between glucose and starch shown in the images.

Answer:

D. Carbon is used to make glucose during photosynthesis, and many glucose molecules are joined to make a starch molecule.