TASK DEFINITION: You are given a question, its answer, and a sentence that supports the question, i.e., the answer to the question is inferable from the sentence. In this task, you need to paraphrase the given sentence so that the paraphrased sentence still supports the question i.e. you can still infer the answer to the question from the paraphrased sentence. Do not write a paraphrase with a minor change in the given sentence e.g. replacing the word "one" with "a". Instead, try to write a paraphrase that contains new words, i.e. the words that are not present in the input sentence.
PROBLEM: Question: A cell’s chromosomes contain? 
Answer: genes. 
Sentence: A cell’s chromosomes contain genes.

SOLUTION: Genes are contained within the chromosomes of a cell.

PROBLEM: Question: Which unit is used to express the amount of energy in food? 
Answer: Calorie. 
Sentence: A calorie is used to express the amount of energy in food.

SOLUTION: Calories are used to show the amount of energy in food.

PROBLEM: Question: Which would help conserve water? 
Answer: Turn off water while brushing teeth. 
Sentence: It would help conserve water to turn off water while brushing teeth.

SOLUTION:
A simple way to conserve more water is to turn of the water while we brush our teeth.