Please help with this question.

Insulin, antibodies, enzymes and progesterone are four of many molecules found in and around cells. Of these four__________ are/is not a protein.

a. antibodies
b. insulin and antibodies
c. antibodies and progesterone
d. progesterone

I think the answer is "A" but am not sure. please help

progesterone does not contain nitrogen: proteins are nitrogenous compounds. Antibodies are proteins.

1 answer

Progesterone.
Similar Questions
    1. answers icon 0 answers
  1. Which of the following best explains how a vaccine works?Choose one: A. Vaccine molecules bind to antibodies, which blocks them
    1. answers icon 1 answer
  2. Which of the following statements is true about enzymes?Enzymes only bind to substrates. Enzymes are only found in certain types
    1. answers icon 1 answer
    1. answers icon 1 answer
more similar questions