It would be completely false to state that adult <span>brains have about five times the number of connections that a three-year-old has. The correct option among the two options that are given in the question is the second option. A child brain has twice as many connections than that of an adult brain. </span>
Answer: Sulfur oxide,carbon dioxide and Nitrogen Oxide are acid anhydride.
Explanation: they are refer to as acid anhydride, because when they dissolved in water,they make the water acidic by reducing the Ph of the water.These gases are greenhouse gases that are released into the atmosphere by human activities like combustion, burning of bushes etc,.when they are released into the atmosphere and have contact with atmospheric water, it leads to acidic rain.
Rocks? not quite sure about this one but good luck and hope this helps! :)
Answer:
a. p53 activates transcription of WAF1.
Explanation:
<u>WAF1 transcription occurs independent of p53 during oxidative stress so p53 does not play any role in cell cycle arrest in the signaling pathway which involves WAF1 . </u>
In rest of the mentioned options, p53 plays a role directly or indirectly. During double stranded lesion in DNA in G1 phase, a sensor protein known as ATM binds the DNA lesion site. ATM is a serine/threonine kinase which phosphorylates another kinase known as chk2. After phosphorylation,<u> chk2 stabilizes transcription factor p53.</u> p53 further acts as a transcription factor for the synthesis of a protein known as p21 which inhibits G1 phase specific CDK and ultimately cell is arrested in G1 phase. The cell remains in arrested state until the DNA lesion is fully repaired. <u>Hence, p53 indirectly blocks G1 to S transition with the help of p21. </u>
As such <u>WAF1 transcription factor involving pathway</u><u> </u><u>also requires p21 protein for causing cell cycle arrest but in this pathway p21 is not synthesized with the help of p53. </u>
