What was the unit membrane model?
Correct answer: A. Plasma membrane has lipid bilayer
- A. Plasma membrane has lipid bilayer
- B. Proteins are embedded in the lipid bilayer
- C. Plasma membrane has charged pores for transport of materials which cannot penetrate through the lipid bilayer
- D. All of the above
Explanation
The unit membrane model was a proposed model of the structure of all cellular membranes. It was first proposed in 1935 by Hugh Davson and James Danielli. The model proposed that all cellular membranes are composed of a bilayer of phospholipids, with proteins sandwiched between the two layers of phospholipids.
Last updated
About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
Practise Cell Structure and Function
2,478 free Cell Structure and Function MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.