Sickle cell anaemia results from the substitution of a single amino acid in haemoglobin. This fact demonstrates that
Correct answer: A. a protein's function depends on its precise amino acid sequence
- A. a protein's function depends on its precise amino acid sequence
- B. haemoglobin is a fibrous structural protein
- C. every mutation is lethal
- D. haemoglobin normally cannot bind oxygen
Explanation
One change in the primary structure alters haemoglobin's shape so that it polymerises in low oxygen, distorting the red cell. The disease is neither lethal in all carriers nor a sign haemoglobin cannot bind oxygen at all, which shows how sensitively function follows sequence.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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 Classification of Biological Molecules questions
Each of the twenty standard amino acids differs from all the others in
Which of the following is a fibrous protein?
The exact sequence of amino acids in a polypeptide chain is called the protein's
Waxes are biologically important to plants and insects because they
In the phospholipid bilayer of a membrane, the fatty acid tails point inwards because they
Which of the following is NOT built from fatty acids?