I dont know if your answer has to match the marking scheme completely
but I can never tell if my answer even if it wasn’t added is correct because its not on the marking scheme.
Often answers can be correct within certain range. Sometimes if you are asked, for example, to make a prediction several answers can be correct, markers would mainly look at the justification of your answer.
You can give examples of the answers you are uncertain about and we could look at them more specifically 