Final answer:
NPH insulin is the intermediate-acting insulin that can be mixed with short-acting insulins, used to manage blood glucose levels in diabetic patients. Insulin injections reduce blood glucose after high-glucose meals, and molecularly cloned insulin is a recombinant protein.
Step-by-step explanation:
The type of insulin suitable for mixing with short-acting insulin is b) NPH insulin. NPH (Neutral Protamine Hagedorn) insulin is an intermediate-acting insulin that can be mixed with short-acting insulins, allowing for both an immediate and a longer-acting effect to manage blood glucose levels. It is important for patients with diabetes who need a combination of fast and prolonged insulin action.
Insulin injections are used to lower blood glucose levels after consuming a high-glucose meal. Also, insulin produced by molecular cloning is a recombinant protein, meaning it's made through recombinant DNA technology, not from pig origin or by the human pancreas. Furthermore, the synthesis of insulin involves the initial creation of preproinsulin, which then goes through a series of modifications to form the active hormone that can regulate blood glucose levels effectively.