Urgent answer  in photosynthesis, plants use radiant energy from the sun and combine it with other reactants to form glucose. which of the following statements best describes the relationship that exists between the formation of glucose and its use? plants contain chloroplasts to undergo photosynthesis and make glucose directly, but they also use mitochondria for cellular respiration. plants contain chloroplasts to undergo photosynthesis and make glucose directly, so they do not need mitochondria.