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Lesson Posted on 27 Mar CBSE/Class 11/Science/Biology/Unit 3: Cell Structure and Function/Chapter 10-Cell Cycle and Cell Division

How U Can Explain Ohm's Law To A Layman Who Is Not Knowing Any Thing About Voltage, Current Or Resistance?

Rahul Kumar

I am a Experienced and passionate Yoga Instructor with over 8 years of teaching experience and advanced...

Consider a tank which is filled with water and placed at some heights. This tank has a pipe connection that is going downwards to another tank in the ground level. The height difference between the two tanks can be considered as the potential difference (which measures in "voltage" ), and the flow of... read more

Consider a tank which is filled with water and placed at some heights. This tank has a pipe connection that is going downwards to another tank in the ground level. The height difference between the two tanks can be considered as the potential difference (which measures in "voltage" ), and the flow of water from the container 1 to tank two can be regarded as the "current". And the funny part is one day a stone got stuck in halfway of pipe and the water flow reduced, which can be considered as the term "resistance."😀

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Lesson Posted on 08/10/2019 Tuition Fee CBSE/Class 11/Science/Biology/Unit 3: Cell Structure and Function/Chapter 9- Biomolecules

Only for 2 months completed all computer work

Neha S.

I am a teacher I am going online home tuition since I am certified in dca I have a degree in b.pharma...

Full computer work and all excel work
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Lesson Posted on 29/08/2019 CBSE/Class 11/Science/Biology Tuition

How to remember the nature of 12 pairs of cranial nerves?

Monalisha Mohapatra

I am interested to teach students of class 9th, 10th, 11th, 12th. Also who are interested for a basic...

Trick- Some Says Money Matters But My Brother Says Big Books Matter Most. Now know the initial letter of each word written in capital. And decode them as S stands for sensory, B stands for both(mixed) and M stands for a motor. For example, 1st pair we can get S (Some), i.e. sensory and so on.No need... read more

Trick- Some Says Money Matters But My Brother Says Big Books Matter Most.
Now know the initial letter of each word written in capital. And decode them as S stands for sensory, B stands for both(mixed) and M stands for a motor. For example, 1st pair we can get S (Some), i.e. sensory and so on.
No need to remember it by taking the stress.

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Lesson Posted on 28/08/2019 CBSE/Class 11/Science/Biology

Cell membrane

Madhukar Dutt Tripathi

I believe in delivering what has been learnt in the most basic and most straightforward way possible....

One of the most impressive structures to be studied. Given by Singer & Nicholson, a membrane is double lipid layer where lipids are present almost running parallel in the cell circumference. In between the lipid layers, lie small proteins, membrane-spanning proteins as well as flip flop proteins... read more

One of the most impressive structures to be studied.

Given by Singer & Nicholson, a membrane is double lipid layer where lipids are present almost running parallel in the cell circumference.

In between the lipid layers, lie small proteins, membrane-spanning proteins as well as flip flop proteins ( receptors) too..!!

The small ones help in maintaining the quasi-fluid state of the membrane while the membrane-spanning proteins and the receptor proteins are involved in the transfer of chemicals, hormones as well as cell signalling and Cascade mechanisms.

Semi-permeable in nature, cell membrane acts as a scanner to scrutiny the substances interacting with the cell and helps in determining the type and structure of substances to be allowed for entry.

A cell membrane also offers the formation of plasmodesmata in lower forms and as a protective layer in advanced eukaryotic cells.

Hence, a cell membrane can be termed as a sea of lipids where protein components act as floating icebergs.

The wear n tear of the membrane is repaired with the help of Smooth endoplasmic reticulum as well as Golgi Apparatus by a process known as MEMBRANE BIOGENESIS.

The membrane remains continuously in the motion state, can be considered more so as flowing jelly.

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Lesson Posted on 02/06/2019 CBSE/Class 11/Science/Biology CBSE/Class 12/Science/Biology

Calvin cycle ( light independent cycle of photosynthesis)

Dr. Swati Sucharita Panda

Well experienced and depth knowledge of the subject, make my personality. A facilitator and role model...

Easy trick to remember the starting, intermediate and end product. RuBy PaGAl ToPper RuBy - First compound - Ribulose bisphosphate PaGAl - intermediate compound - Phosphoglyceric acid ToPper - End compound - Triose phosphate Step of Calvin cycle 1. Carboxylation 2. Reduction 3. Regeneration... read more

Easy trick to remember the starting,  intermediate and end product.

RuBy PaGAl ToPper

RuBy - First compound - Ribulose bisphosphate 

PaGAl - intermediate compound - Phosphoglyceric acid

ToPper - End compound - Triose phosphate 

Step of Calvin cycle 

1. Carboxylation 

2. Reduction 

3. Regeneration 

 

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Lesson Posted on 11/09/2018 CBSE/Class 11/Science/Biology

Endosperm of Gymnosperms

Vinay

I believe in clearing the concepts of students. I can help you build a strong foundation. Doubts will...

In Gymnosperms seed are not covered as an ovary does not enclose the ovule. Ovarian wall =friut wall (after fertilisation) Ovule has nucelus(2n) nutririvn tissue and one integument. One cell of nucleus get modified, and form Megaspore mother cell (2n) which by meiosis form 4 megaspore(n), 4 out of... read more

In Gymnosperms seed are not covered as an ovary does not enclose the ovule.

Ovarian wall =friut wall (after fertilisation)

Ovule has nucelus(2n) nutririvn tissue and one integument.

One cell of nucleus get modified, and form Megaspore mother cell (2n) which by meiosis form 4 megaspore(n), 4 out of 3 disintegrate and one remain functional.

Functional Megaspore germinates inside ovule and forms female gametophyte(n).

Female gametophyte has Archegonia with egg. After pollination (anemophily;wind) fertilisation takes place. The egg develops into zygot-embryo-seed (2n).

The persistent female gametophyte (n) is now called endosperm. Therefore it is haploid(n).

Gymno seed = three generations ( persistent nucleus is parent sporophyte, the endosperm is persistent gametophyte and embryo is future sporophyte).

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Asked on 12/08/2018 CBSE/Class 11/Science/Biology

%3Cp%3E1.%20Economic%20importance%20of%20animals%202.%20Economic%20importance%20of%20plants.%20Comes%20in%20which%20chap... read more
%3Cp%3E1.%20Economic%20importance%20of%20animals%202.%20Economic%20importance%20of%20plants.%20Comes%20in%20which%20chapter%20of%20ncert%20biology%20book%3C%2Fp%3E read less

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Asked on 12/08/2018 CBSE/Class 11/Science/Biology

Economic importance of animals and plants comes in which chapter of biology

Answer

Lesson Posted on 26/07/2018 CBSE/Class 11/Science/Biology

Nervous system in human.

Sashank Sir

"Education is not preparation for life;it is life itself." Sashank Sir is the best tutor in bhubaneswar...

1.What are the main important part of human nervous system. Ans:The main parts of nervous system are Central Nervous System (CNS),Peripheral Nervous System (PNS) and Autonomic Nervous System (ANS). 2.CNS consist of which part of human body? Ans:CNS consist of human brain and spinal cord. 3.PNS consist... read more

1.What are the main important part of human nervous system.

Ans:The main parts of nervous system are Central Nervous System (CNS),Peripheral Nervous System (PNS) and Autonomic Nervous System (ANS).

2.CNS consist of which part of human body?

Ans:CNS consist of human brain and spinal cord.

3.PNS consist of which part of human body?

Ans:PNS consist of cranial nerves(12pairs) and spinal nerves (13 pairs).

4.What is ANS?

Ans:Two sets of nerves (parasympathetic and sympathetic) supplying visceral organs which are antagonistic to eachother.

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Lesson Posted on 22/07/2018 Biomolecules CBSE/Class 11/Science/Biology Exam Coaching/Engineering Entrance Coaching/GATE Coaching/Biotechnology +2 CBSE/Class 9/Science/Unit 1-Matter - Its Nature & Behaviour/Atoms and Molecules CBSE/Class 10/Science/Unit II: World of Living/Life Processes less

Basics of Nucleic Acid (part 2)

Ankita Das

I am an experienced, qualified tutor with over 5 years of experience in teaching Science subjects (physics...

Now let's move on to RNA i.e Ribonucleic Acid. RNA is also macro molecule made up with polymer of nucleotides. One of the major difference between DNA and RNA is that unlike DNA, RNA is single stranded. It doest not hold the concept of "base pairing". It is also helical. Like DNA, RNA also has nucleotides... read more

Now let's move on to RNA i.e Ribonucleic Acid.

RNA is also macro molecule made up with polymer of nucleotides. 

One of the major difference between DNA and RNA is that unlike DNA, RNA is single stranded. It doest not hold the concept of "base pairing". It is also helical.

Like DNA, RNA also has nucleotides which are made up of one nitrogen base, one ribose sugar, and a inorganic phosphate residue.

Here is also same classification of nitrogen base catagory,i.e Purine and Pyrimidine.

As purine, RNA has adenine and Guanine.

But as pyrimidine, RNA has Uracil and Cytosine. So here is a new base named uracil. RNA does not have thymine.

 

Depending on the structure and function , RNA can be classified into 3 major catagory--

• messenger RNA (mRNA)

• ribosomal RNA (rRNA)

• transfer RNA (tRNA)

 

mRNA holds a crucial function in life processes. It has the particular code to make a particular protein.

 

So the major differences between DNA and RNA are--

 

DNA RNA
Double stranded  single standed
It has de-oxy-ribose sugar 
it has ribose sugar
It has thymine as pyrimidine base it has Uracil as pyrimidine base
It is the genetic material of most of the organisms in the world. Few bacteria and viruses has RNA as genetic material.
It can be catagorized into B-DNA, A-DNA, Z-DNA it can be catagorized into mRNA, rRNA, tRNA

 

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