Myoglobin combines with:
Correct answer: D. One oxygen molecule
- A. Four oxygen molecules
- B. Three oxygen molecules
- C. Two oxygen molecules
- D. One oxygen molecule
Explanation
Myoglobin is a protein found in muscle tissues with a tertiary structure comprising a single polypeptide chain. This structure allows it to bind with only one oxygen molecule. In contrast, hemoglobin, which is found in the blood, has a quaternary structure with four polypeptide chains, enabling it to bind with four oxygen molecules. Thus, myoglobin's ability to bind with only one oxygen molecule is due to its simpler structure compared to hemoglobin.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Proteins
Proteins are polymers of amino acids joined by peptide bonds, and their function depends on primary, secondary, tertiary and quaternary structure. The topic covers fibrous and globular proteins, enzymes, antibodies, hormones and transport proteins, as well as denaturation by heat or extreme pH.
Practise Biological Molecules
1,790 free Biological Molecules MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Proteins questions
Peptide bond is formed between:
The enormous diversity of protein molecules is mostly due to the diversity of:
In sickle cell hemoglobin only one glutamic acid of normal hemoglobin is replaced by?
The example of Globular potein is:
_ is a protein found in milk.
In sickle cell, haemoglobin molecule, glutamic acid, is replaced by: