Final answer:
The correct answer is option b. The Krebs Citric Acid Cycle occurs in the mitochondrial matrix and involves eight steps, not seven. It is primarily catabolic, but also has anabolic elements. Therefore, statements i and iii are correct, making option B the right answer.
Step-by-step explanation:
The Krebs Citric Acid Cycle is a key component of cellular respiration and occurs in the mitochondrial matrix, not the inner membrane of mitochondria. This cycle involves a total of eight steps, not seven, and serves to generate energy carriers such as NADH and FADH2. It primarily features catabolic reactions, which break down molecules to produce energy, but it is not exclusively catabolic as it also has elements of anabolism in the cycle.
Answering the question, the correct option for the statements provided is:
B) i and iii
i. It occurs in the matrix and inner membrane of the mitochondria is true, but it mainly occurs in the matrix. ii. There are not 7 steps, but 8. iii. It primarily involves catabolic reactions is true; however, it's important to understand that anabolism can also be involved in the cycle.