_ is needed in thyroxine, the hormone of thyroid gland.
Correct answer: D. Iodine
- A. Mg2+
- B. K+
- C. Ca2+
- D. Iodine
- E. Zinc
Explanation
The thyroid gland uses iodine from food to make two thyroid hormones: triiodothyronine (T3) and thyroxine (T4). It also stores these thyroid hormones and releases them as they are needed.
Last updated
About Macromolecules
Proteins are classified by shape, composition and structure, from primary amino acid sequence to secondary, tertiary and quaternary organisation, and their biological roles are linked to this structure. Enzymes are examined as protein biocatalysts, including active sites, substrate specificity, activation energy, cofactors and factors affecting activity.
Practise Macromolecules
299 free Macromolecules MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1 calorie = _ Joules.
A carbohydrate that cannot be acid hydrolyzed is called a:
A chemist isolated a protein from a crab and wanted to determine its molecular weight. Which of the following method would have given the best result for him?
A dipolar charged but overall electrically neutral ion is called:
A disease caused by Plasmodium parasite is: