Answer:
Phospholipid bilayer
Explanation:
That is essentially the primary componenent of the cell membrane where phospholipids form two layers.
Answer:
I think this is the answer: Hormones stimulate the pancreas to release enzymes needed to break down food.
Explanation:
Hope this helps.
The letter should contain concerns about the causes and ill effects of erosion.
<h3><u>Explanation</u>:</h3>
Sir,
I am very sad to inform you that the town of Hariharanpur is suffering from continuous erosion for the last 3 years. Even after having proper knowledge about this fact, you being the mayor, are not taking any charge of this situation.
The town is situated just by the side of River Ganges which makes it's soil full of moisture. Along with the repeated deforestation and tree cutting for urbanisation, the smallest of the rain falls are also eroding a lot of soils. This can lead to severe landslides in river Ganges with severe loss of properties as well as loss of lives too.
So i request you to start embanking the river as well as to start planting new trees to save the town from getting lost under Ganges.
Thanking you,
XYZ.
A more recently developed cancer treatment is targeting telomerase activity. So the correct answer is b)stimulating telomerase activity.
A topic of ongoing attention is the use of telomeres and telomerase as potential targets for the treatment of cancer. The telomerase enzyme is in charge of maintaining the telomeres, which cover and safeguard the ends of chromosomes.
Cells lacking telomerase experience replicative senescence, a growth stop, after a certain number of cell divisions. Inactivating essential cell cycle checkpoints is the first step in the vast majority of malignancies to overcome replicative senescence. Once telomeres are critically short, telomerase expression is then increased.
It has been demonstrated that telomerase suppression causes telomere shortening in cancer cells. After enough cell divisions, this attrition might result in telomere uncapping and the activation of apoptosis.
To learn more about telomerase click here
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Answer:
DNA polymerase
Explanation:
The process in which DNA make its copies is called DNA replication.
It is true that DNA do not have any catalytic activity in the cells but there are several enzymes which participate in the process of DNA replication and performs different functions. DNA Polymerase is one of the key enzyme that participate in the process and catalyzes the formation of phosphodiester bonds between adjacent nucleotides in the DNA.
Arthur Kornberg in 1956 discovered DNA polymerase along with his colleague in Escherichia coli. DNA Polymerase catalyzes the addition of phosphodiester bonds with the help of formation of hydrogen bonds between the adjacent strands of DNA and build the backbone of DNA. Other functions of DNA polymerase involves synthesis of DNA from the RNA primers , helps in the elongation of leading strand, and DNA sequencing.
Hence, DNA polymerase is catalyzes the formation of phosphodiester bonds between adjacent nucleotides in the DNA.