Every living thing is made up of cells. If cells did not exist, there would be no life.
I think the correct answer would be A. If the epithelial cells in the stomach failed to produce mucus, then the gastric juice would digest the stomach lining, resulting in ulcers. The mucus that are produced by specialized epithelial cells aids in the protection of the stomach lining from the juices that are acidic. Thus, without this mucus, the lining would be damage and would cause stomach problems.
Answer:
Option C . Flip-flops are very rare for phospholipids.
Explanation:
Flip-flop means that movement of phospholipds upside down. This phenomenon occur in cell membrane but very rarely. I have attached a picture for you to under stand how flip-flopping occurred.
Answer:
The correct option is C ' Each of the three types of RNA are transcribed by different RNA polymerases. Only RNA polymerase II, involved in mRNA synthesis, contains a domain capable of interacting with enzymes that form the cap.'
Explanation:
All the different type of RNA's undergo the process of transcription. However, their transcription is carried on by different types of RNA polymerases.
The transcription of the mRNA is carried by RNA polymerase II. The process of capping is essential so that the mRNA is stopped from degradation.
The rRNA is transcribed by RNA polymerase I which cannot add a cap tothe RNA.
The tRNA is transcribed by the RNA polymerase II, but the domain is different which cannot undergo the process of capping.