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>
Answer:
brain, spinal cord, and nerves
Explanation:
you could be meaning something else but this is what i was taught in anatomy
Sugar is a component of carbohydrates, but it should be noted that this is a slightly misleading question, since sugar itself is actually a carbohydrate.
Answer: Organic compounds are used as building blocks for water, DNA, and starches water, proteins, and oxygen proteins, DNA, and carbon dioxide proteins, starches, and fats
water, DNA, and starches
water, proteins, and oxygen
proteins, DNA, and carbon dioxide
proteins, starches, and fats
Explanation:
I believe the first part is conduction. I'm sorry I can't help with the rest.
