CBSE BOARD CLASS -12 PHYSICS MOST IMPORTANT QUESTIONS.

Here is a link for class 12 physics most important physics questions -

https://youtu.be/AwpPmtC8UJ8

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Total seats in AIIMS and JIPMER

Many of the students are seeking to know about total number of seats in AIIMS and JIPMER.
Although this year AIIMS SEATS will be filled by NEET .
Since the last decade AIIMS increase its seat and it become 1205 in all AIIMS.
But in JIPMER only 150 students can take admissions for MBBS course.

CHEMICAL KINETICS- FIRST ORDER REACTION

Hey guys video is out for first order kinetics. In this video I’m discussing about formula of first order kinetics, it’s half life and graph.
You can check it here- https://youtu.be/KjsxGclfFco

How to find number of atom in different mole.

Mole is a fundamental quantity which defines the amount of substance. Mole is obtained by dividing given mass of substance to its molecular mass.
                Mole = Given mass of substance / Molecular mass of substance
Once you get the moles of substance , next you will go to calculate the numbers of atom by using Avagardo’s  rule-
According to this rule - Number of atoms in 1 mole of substance is equal to = 6.023*10to the power23
So 2 mole substance contain - 2 * 6.023*10 to the power 23

Mesophyll Tissue

Mesophyll is situated below the epidermis. It help in photosynthesis . Mesophyll is composed of two type of cell-
1- Palisade Parenchyma
In this type of cell chloroplast content is more , so it play major role in photosynthesis.
Generally it forms a single well organised layer just below the epidermis.
2- Spongy parenchyma
There are large spaces left between the cells of spongy parenchyma. These large spaces allow these
layers to help Co2 move around the leaf. The Spongy mesophyll also allow plant to bend and move in wind, which itself move gases around the leaf cell.
Spongy parenchyma also help in photosynthesis.
Mesophyll is a type of ground tissue. It consist of following part-

Corona virus

What is Corona virus?
Corona virus is a virus that can make animals and humans sick. It is an RNA virus, which means that it breaks into cells inside a body and uses them to regenerate itself. The corona virus is spreading in Wuhan, China like never before. Therefore, not much information is available about it.
Experts believe that the corona virus comes from a family of viruses that infect humans, cattle, pigs, chickens, dogs, cats and wild animals.
Until this new corona virus was identified, there were only six different corona viruses to infect humans. Four of these caused a mild common cold disease. However, since 2002, there have been two new corona viruses that can infect humans and make them seriously ill.
According to the World Health Organization (WHO), the virus is linked to seafood and is thought to have originated from a seafood market in Wuhan city of Huawei province, China. Corona virus belongs to the family of viruses and people are getting sick from it. The virus is also entering many animals, including camels, cats and bats. The WHO has also expressed apprehension that the virus can spread from one person to another.

How does this virus spread?
This disease can spread to people only through cough and sneeze, this means that this virus can be easily transmitted to anyone. Apart from this, it can also be spread through close contact, kissing or sharing utensils through saliva. Because it infects the lungs, the droplets released from the mouth while coughing can also infect the person present.

What are the symptoms?
Symptoms begin to appear at least 14 days after becoming infected with the virus. In corona virus patients usually see the initial symptoms like cold, cough, sore throat, difficulty in breathing, fever. These symptoms then cause pneumonia and kidney damage.

Treatment of Corona virus
There is no cure for corona virus at this time. Antibiotics do not fight viruses, so their use is futile. Although antiviral drugs can come in handy, it takes years to understand and solve a new virus.

There is no vaccine available so far to get rid of the corona virus. Scientists are making vaccines to treat this virus.

UPSC GS-2 paper

Hey guys u can download it from here- https://drive.google.com/file/d/1PncNd62gisbRdQ3AkzNlYfVDrp_eo5z7/view?usp=drivesdk

KREB CYCLE

Kreb cycle is the process of oxidation of of acetyl co-A into CO2. This process is discovered by H.A KREB . KREB cycle occurs in matrix of mitochondria . All the essential enzymes required for this process ( citrate synthatase , aconitase ,Decarboxylase etc ) present in mitochondrial matrix except marker enzyme succinic dehydrogenase .
When acetyl co-A enters in matrix of mitochondria, it is accepted by acceptor molecule oxaloacetic acid . Oxaloacetic acid and acetyl Co-A combine to form a 6 carbon compound citric acid and the cycle start with the formation of different compound like- cis aconitase , iso citrate , oxalosuccinate, alpha keto glutrate, succinyl coA , succinate , Fumarate, malate and oxaloacetate.
In this process 3 NADPH2, 1 GTP , 1 FADH2 is formed.

You can watch this on your YouTube channel- https://youtu.be/q9jXkIrBlNw

Cross tolerance

Cross tolerance- It is the development of tole­ rance to pharmacologically related drugs, e.g. alcoholics are relatively tolerant to barbiturates and general anaesthetics. Closer the two drugs are, more complete is the cross tolerance between them, e.g.-
There is partial cross tolerance between morphine and barbiturates but complete cross tolerance between morphine and pethidine.
Mechanisms responsible for development of tolerance are incompletely understood. However, tolerance may be:
(i) Pharmacokinetic/drug disposition tole­ rance-the effective concentration of the drug at the site of action is decreased, mostly due to enhancement of drug elimination on chronic use, e.g. barbiturates, carbama­ zepine, amphetamine.
(ii) Pharmacodynamic/cellular tolerance­ drug action is lessened; cells of the target organ become less responsive, e.g. morp­ hine, barbiturates, nitrates. This may be due to down regulation of receptors or weakening of response effectuation.
Tachyphylaxis (Tachy-fast, phylaxis-protectionJ 10 rapid development of tolerance when doses of c. drug repeated in quick succession result ir marked reduction in response. This is usuall;: seen with indirectly acting drugs, such as
ephedrine, tyramine, nicotine. These drugs act b' releasing catecholamines in the body, synthesis of which is unable to match the rate of release stores get depleted. Other mechanisms like slm,· dissociation of the drug from its receptor, desensi­ tization/internalization or down regulation or receptor, etc. and/or compensator: homeostatic adaptation.
 Drug resistance Itreferstotoleranceofmicro­ organisms to inhibitory action of antimicrobials. e.g. Staphylococci to penicillin

Acute sinusitis

Acute sinusitis (acute rhinosinusitis) causes the cavities around your nasal passages (sinuses) to become inflamed and swollen. This interferes with drainage and causes mucus to build up. 

With acute sinusitis, it may be difficult to breathe through your nose. The area around your eyes and face may feel swollen, and you may have throbbing facial pain or a headache. 

Acute sinusitis is most often caused by the common cold. Other triggers include allergies, bacterial and fungal infections. Treatment of acute sinusitis depends on the cause. In most cases, home remedies are all that's needed. However, persistent sinusitis can lead to serious infections and other complications. Sinusitis that lasts more than eight weeks or keeps coming back is called chronic sinusitis. 

SYMPTOMS

Acute sinusitis symptoms often include: 

• Drainage of a thick, yellow or greenish discharge from the nose or down the back of the throat
• Nasal obstruction or congestion, causing difficulty breathing through your nose
• Pain, tenderness, swelling and pressure around your eyes, cheeks, nose or forehead
• Reduced sense of smell and taste
• Cough, which may be worse at night

Other signs and symptoms can include:

• Ear pain
• Headache
• Aching in your upper jaw and teeth
• Bad breath (halitosis)
• Fatigue
• Fever