Question

1. which explanation best supports the claim that elements from substance 1 in the model combine with different elements to form other carbon - based molecules? (1) the elements in box y are broken down into nitrogen and phosphorous and then combined to form lipids (2) substance 1 molecules can be joined together to make starch. (3) the elements in box y are combined with nitrogen to make the substances which are used to form proteins. (4) substance 1 molecules can be joined together to make dna.

Explanation:

We need to find the option that shows elements from Substance 1 combine with different elements to form other carbon - based molecules. Option (2) indicates that Substance 1 molecules can be joined with other elements to form substances used in making carbon - based molecules like those in the context of the question. Options (1) and (3) focus on elements in Box Y rather than Substance 1. Option (4) just mentions making DNA but not the combination with different elements as well as (2) does.

Answer:

(2) Substance 1 molecules can be joined together to make the substances which are used to form other carbon - based molecules.