plz help me out with this
promise the best answer will be Mark as brainliest
spammers are not allowed
plz. it's urgent
Answers
✨ welcome to the world of science ✨
answer 1:
by diffusion
process carbon dioxide and oxygen enters and exist from the cell .
answer 2:
membrane biogenesis
Membrane biogenesis is the synthesis and production of specific “molecular components” and their assembly into “cellular membranes”. This is a continuous process in which cells are involved in throughout their existence.
answer 3:
Plant cells are actively involved in water transportation, and thus plant cell wall ensures that the cell does not burst due to over expansion as water flows in (internal turgor pressure). It helps to maintain the shape and osmolarity of thecells and acts as defense against pressure due to inflow of water.
Besides this cell walls also provides structural and mechanical support, protection against pathogens and dehydration.
answer 4 :
a)
Ribosomes are the primary site of protein synthesis in a cell. if ribosomes are removed from acell, that stops. It also depends on whether the ribosomes are removed from the cell organelles. ... If the ribosomes are removed from them, protein synthesis stops completely.
b)
The Golgi Apparatus helps in the formation of lysosomes.
If Golgi apparatus is removed from the cell the formation of lysosomes will not occur.
There are chances that the cell will die.
answer 6:
The main function of leucoplasts is storage. Leucoplasts are plastids found in plants where photosynthesis does not take place.
answer 7:
SER in the liver of vertebrates helps in detoxification . It metabolizes various toxic and poisonous substances such as drugs , aspirin , insecticides , petroleum products and pollutants . These toxic substances make their entry in animal's body through food , air , and water .
answer 8:
Because ribosomes are attached to Rough endoplasmic reticulum for protein synthesis. That's why RER appears rough.
answer 9:
Virsuses are not considered "alive", "living "because they lack many of the properties that scientists associate with living organisms. Primarily, they lack the ability to reproduce without the aid of a host cell, and don't use the typical cell- division approach to replication.
answer 10:
Nucleoid is an irregularly shaped region.
- The nucleoid may also contains RNA, proteins, and enzymes that can be used for cellular processes.
- Prokaryotes lack an organized nucleus and other membrane bound organelles.
- Prokaryotic DNA is found in central part of the cell called the nucleoid.
answer 11:
Dry raisins undergo a process called osmosis. Osmosis is a process by which the molecule of a solvent tend to pass through a semipermeable membrane from less concentrated solution into a more concentrated one.
Osmosis can be devided into 2 types : Endosmosis and exosmosis.
Dry raisins swell up because they undergo Endosmosis. When the raisin is placed in a hypertonic solution i.e. water then the water penetrates through the semipermeable membrane i.e. the skin of the raisin and hence the raisin swells up.
in simple words
When dry raisins are put in plain water for some time, they swell up as water will move from higher concentration to lower concentration and the process is called osmosis. If raisins are not placed in concentrated salt solution, they will shrink.
Best of luck for exams
I hope it help you ❤️