Answer and Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files.
Plant cells are eukaryotic cells that have a definite nucleus with specialized structures known as organelles that perform different functions within the cell. Some organelles of the plant cells with their function include; nucleus (controls the cells activities and contains genetic materials), cell wall (support the cell and also maintains high turgidity), ribosomes (synthesizes protein), mitochondria (produces ATP (energy) out of food), Golgi Apparatus (process and package proteins), chloroplasts (produces food by photosynthesis using sunlight), vacuole (stores water or food molecules) and lysosome (contains digestive enzymes that break down food).
But this rule rule is applicable only for double stranded DNA molecule. The possibility of Adenine=40% and Thymine=60% is only in single stranded DNA molecule. In the question, the DNA sample referred is a single stranded DNA. hope it helps :D
Universal genetic code means the code is responsible for synthesis of the same protein in every organism.