Proteins have many functions. Which of the following can be functions of proteins?

I. Enzymes

II. Transcriptional regulators

III. Structural proteins

IV. Hormones

Which of the following is not typical of an enzyme?

How do enzymes speed up reactions?

The Gila monster, H. suspectum, produces a neurotoxic venom containing helothermine, which causes lethargy and partial paralysis of the limbs. Considering that this toxin partially inhibits voluntary muscle contraction, which of the following is the most likely mechanism?

Which of the following statements about the general roles and properties of biological enzymes is not true?

Which of the following are true about enzyme inhibition?

I. Enzymes can be inhibited by end-products of that enzymatic pathway

II. Competitive inhibitors can lower an enzymes

III. Non-competitive inhibitors inhibit enzyme action by binding to a site other than the active site

IV. Non-competitive inhibitors can lower an enzymes

Enzymes come in many shapes and sizes and serve various functions. Which of the following are characteristics of enzymes?

I. Allow non-spontaneous reactions to occur

II. Bring substrates together in the proper orientation for catalysis

III. Reduce the activation energy of the reaction

IV. Reduce the free energy change of reaction

The activity of certain enzymes can be modulated via effector binding to __________ sites; regulation at these sites often results in a conformational changes that alters the activity level of the enzyme either positively or negatively without the effector binding to the active site.

What is the group of proteins needed for cell synthesis in bacteria called?

After an unknown compound is added to an enzyme-mediated reaction mixture, the enzyme rate is reduced but remains constant. Which of the following best explains this situation?