AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is considered as a quaternary protein:
A
Transthyretin
B
Hemoglobin
C
Collagen
D
All choices are correct
Explanation: 

Detailed explanation-1: -Examples of proteins with quaternary structure include hemoglobin, DNA polymerase, ribosomes, antibodies, and ion channels.

Detailed explanation-2: -The correct answer is option (C) Maybe either alpha or beta and depends on the primary structure of subunits. Note: Proteins consisting of two or more similar or various polypeptide chains (subunits) occur in proteins. Since they have two or more subunits, these proteins are called oligomers.

Detailed explanation-3: -Proteins with a quaternary structure can be classified into homomultimeric, that is, proteins that have identical subunits, and heteromultimeric, which are proteins with different types of subunits.

Detailed explanation-4: -Proteins with several polypeptide chains have one more level of structure called the quaternary structure, which refers to the spatial relationship of the polypeptides or subunits within the membrane.

There is 1 question to complete.