Answer:
A mutation in Ras protein which will cause hyperactivity will eventually lead to cancer.
Explanation:
Ras protein was first discovered in Rous sarcoma virus (RSV) and it is a proto-oncogene product. In normal conditions, it plays an important role in cellular signalling but in case of gain of function/hyperactivity it gets converted into cellular oncogene. In several types of cancers a point mutation has been reported in Ras protein.
Just like G protein, it is also a GTPase switch protein but unlike G protein which is trimeric, it is monomeric. In the plasma membrane, it is attached with the help of lipids like prenyl or palmitoyl groups. During signal transduction pathway when it gets activated, it downstream activates MAPK pathway and causes gene expression but when it gets hyperactivated it causes over expression of genes leading to cancer.
C.All organisms have cells with different shapes and functions
Answer:
Started in China it spread through people that went to visit other places or items that were manufactured there were contaminated
Answer:
The answer is A) Phagocytosis.
Explanation:
An amoeba usually gets its nutrients from engulfing large food particles by the process of phagocytosis.
- As an amoeba approaches the desired food particle, it <u>extends it pseudopods</u> around it, eventually <em>surrounding the food </em>and internalizing it.
- The food then becomes enclosed by the pseudopodia, creating a <u>food vacuole</u>.
- Digestive enzymes, such as <u>lysosomes</u>, will <u>fuse with the food vacuole</u> and start breaking down the food. The nutrients will then be diffused throughout the cytoplasm.
30 cups is the same as 2.1 liters.
