All of the following statements regarding insulin are correct EXCEPT It is produ

Question

All of the following statements regarding insulin are correct EXCEPT It is produced by the ?eta cells of the islets of Langerhans in the pancreas. Preproinsulin is clipped to form proinsulin in the endoplasmic reticulum Proinsulin is converted to insulin in storage vesicles in the ? cell. The active hormone is made up of one ? chain linked by disulfide bonds to a C chain. The essential amino acids are best described as major sources of carbon for gluconeogenesis only ingested in the form of diet synthesized only in the liver all basic amino acids What is the chemical difference between nicotinamide adenine dinucleotide (NAD+) and its phosphate (NADP4)? NADP* has an additional phosphate group at the 2' position on the pentose adjacent to adenine NADP* has a nicotinate moiety rather than a nicotinamide NADP' has an additional pyrophosphate group NADP has an additional phosphate linked directly to the adenine ring Which of the following is a coenzyme that involves

Explanation / Answer

Hi, here are your answers with brief details:

1. Its d since the chains are called A- and B-chains.

2. it is b, since the amino acids which are not synthesized in the body are called essential. These are obtained from diet.

3. a. There is an additional phosphate group linked to the sugar ring.

4. d, NAD+ is the coenzyme that oxidizes the substrate.

5. b, ubiquinone is a two-electron carrier in many reactions.

6. b. Epinephrine effects include increased glucagon secretion and lower insulin secretion.

Hope that helps.

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