Showing posts with label class11-biology. Show all posts
Showing posts with label class11-biology. Show all posts

Monday 15 May 2023

Class 11 Biology: How does Ion Movement and Gradients play an important role in diffusion and osmosis in plasma membrane? #biology #eduvictors

How does Ion Movement and Gradients play an important role in diffusion and osmosis in plasma membrane?

Class 11 Biology

Class 11 Biology: How does Ion Movement and Gradients play an important role in diffusion and osmosis in plasma membrane? #biology #eduvictors


Ion movement and gradients play an important role in diffusion and osmosis in plasma membranes.

  • Diffusion is the movement of particles from an area of high concentration to an area of low concentration. In the case of plasma membranes, ions will diffuse from an area where they are more concentrated to an area where they are less concentrated. This process is driven by the kinetic energy of the ions, and it does not require any energy input from the cell.
  • Osmosis is the movement of water across a semipermeable membrane from an area where it is more concentrated to an area where it is less concentrated. The concentration of water is affected by the concentration of dissolved ions. In the case of plasma membranes, water will move from an area where there is a high concentration of dissolved ions to an area where there is a low concentration of dissolved ions. This process is also driven by the kinetic energy of the water molecules, and it does not require any energy input from the cell.

Ion movement and gradients can affect the rates of diffusion and osmosis in plasma membranes. For example, if the concentration of ions on one side of the membrane is increased, the rate of diffusion of those ions will decrease. This is because the ions will be more likely to collide with each other and with the membrane, which will slow them down. Similarly, if the concentration of water on one side of the membrane is increased, the rate of osmosis will decrease. This is because the water molecules will be more likely to collide with each other and with the membrane, which will slow them down.

Ion movement and gradients are also important for the maintenance of the resting membrane potential. The resting membrane potential is a difference in electrical charge between the inside and outside of a cell. This difference in charge is created by the unequal distribution of ions across the membrane. The concentration of sodium ions is higher outside the cell, while the concentration of potassium ions is higher inside the cell. This difference in ion concentration creates an electrical gradient across the membrane. The resting membrane potential is important for a variety of cell functions, including cell signaling and cell division.



Wednesday 14 July 2021

Biology Quiz - 6 (#NEET)(#premedical)(#AIPMT)(#class12Biology)(#eduvictors)(#class11Biology)(#class12Biology)

Biology Quiz - 6 

Biology Quiz - 6 (#NEET)(#premedical)(#AIPMT)(#class12Biology)(#eduvictors)(#class11Biology)


Q1: Which of the following statements is wrong for viroids?

(a) They cause infections.

(b) Their RNA is of high molecular weight.

(c) They lack a protein coat.

(d) They are smaller than viruses.

Thursday 4 March 2021

Biology: Know Your Vitamin Quiz (#biology)(#NEET)(#PreMedical)(#Class12Biology)(#compete4exams)(#eduvictors)

Know Your Vitamins Quiz

Biology: Know Your Vitamin Quiz (#biology)(#NEET)(#PreMedical)(#Class12Biology)(#compete4exams)(#eduvictors)



1. What is the source of Vitamin A in Leafy vegetables?




2. Which Vitamin is known as the anti-infetive vitamin




3. Which Vitamin is used for ELISA test (AIDS)?




4. Which Vitamin contains Cobalt?




Thursday 25 February 2021

Class 11 Biology Annual Sample Question Paper 2020-21 (#class11Biology)(#eduvictors)(#cbsepapers)

Class 11 Biology Annual Sample Question Paper  2020-21

Class 11 Biology Annual Sample Question Paper  2020-21 (#class11Biology)(#eduvictors)(#cbsepapers)
Learning is a continual process. To improve scores, the best way is to learn and practice. Solving question papers help students to evaluate their knowledge and familarise with different types of question patterns being asked in examination. 

Biology can primarily be divided into two separate branches. These branches are zoology and botany. Zoology comprises the study of animals, while botany consists of the study of plants.What is life? What are life processes? How do plants breathe? How living organisms are organised and classified, what the structure and functions of cells are, and all about the physiology of plants and human beings. The Class 11 Biology covers all these topics.

Eduvictors provides CBSE Previous Year Papers and Sample Question Papers for Class 11 Maths, Biology, Physics, Chemistry, English and Computer Science with/without solutions to help students in their board exam preparation.

1. CBSE New Pattern 15 Sample Paper Biology Class 11 for 2021 Exam with reduced Syllabus

2. Oswaal CBSE Sample Question Paper Class 11 Biology Book (Reduced Syllabus for 2021 Exam)

Here attached the Biology Sample Question Paper (2020-2021).

Saturday 3 October 2020

Biology - Scientific Names (#Class11Biology)(#NEET)(#Class12Biology)(#Class9Biology)

 Biology - Scientific Names 

Biology - Scientific Names (#Class11Biology)(#NEET)(#Class12Biology)(#Class9Biology)


1. Swedish botanist Carolus Linnaeus established binomial nomenclature. 

2. Caper Bauhin expressed proposed binomial nomenclature for the first time 

3. In binomial nomenclature, the first word is a generic name having first letter capital and second word is a  specific epithet having first letter. e.g.  Homo sapiens, Mangifera indica

4. After end of biological name, the name of author is written in abbreviated form who gave the name to that organism.

5. Both the words of a biological name when handwritten are separately underlined and when printed are typed in italics to indicate their Latin origin and also give respect to the name.

Monday 24 August 2020

CBSE Class 11 Biology - The Living World - An Overview of Virus and Viroids (#class11biology)(#viruses)(#viroids)(#eduvictors)

An Overview of Virus and Viroids ( Q & A)

CBSE Class 11 Biology - The Living World 

CBSE Class 11 Biology - The Living World - An Overview of Virus and Viroids  (#class11biology)(#viruses)(#viroids)(#eduvictors)


Q1: Do five kingdom classification include viruses, viroids and lichens?

Answer: Five kingdom system of classification do not includes Virus, Viroids and Lichens.


Q2: What is a virus? What is its structure?

Answer: Viruses are non-cellular organisms having inert crystalline structure outside the living. A virus is a small particle consisting of a nucleic acid core surrounded by a protein coat; in order to reproduce, a virus must infect a living cell.

Tuesday 9 June 2020

CBSE Class 11 Biology - The Living World - Very Short Answer Based Questions(VSQA)(#eduvictors)(#class11Biology)

The Living World - Very Short Answer Based Questions

CBSE Class 11 Biology
CBSE Class 11 Biology - The Living World - Very Short Answer Based Questions(VSQA)(#eduvictors)(#class11Biology)


Q1: Who is called Father of Biology and Zoology?





Q2: Name the Father of Botany.





Q3: Father of Plant Physiology





Q4: Father of Mycology





Monday 9 September 2019

Class 11 Sample Question Papers (Mid-Term) 2019-20(#eduvictors)(#cbsepapers)

Class 11 Sample Question Papers (Mid-Term) 2019-20

Class 11 Sample Question Papers (Mid-Term) 2019-20(#eduvictors)(#cbsepapers)


CBSE Sample Papers for Class 11 are taken into consideration as the best option to understand the question paper pattern very well. It's crucial to be in touch with all basic principles and concepts a few days before the final examination, to reduce the examination stress and be prepared for it. 

Eduvictors provide collection of sample question papers prepared by various schools and institutes 
that help you to practice and get familiar with the question paper pattern. Solving an ample variety of sample papers, together with the last years' pattern papers, has been the recommendation to students.

Here are links of mid-term or SA1 SQPs:

Wednesday 20 March 2019

AIPMT/NEET - Biology Quiz (#neetbiomcqs)(#eduvictors)

AIPMT/NEET - Biology Quiz 

AIPMT/NEET - Biology Quiz (#neetbiomcqs)(#eduvictors)
Honey Bee
(credits: Sandeep Handa)

Multiple Choice Questions

Q1: Which of the following structure is not found in bryophytes?
(a) A cellulose cell wall
(b) Chloroplast
(c) Sporangium
(d) Root


Q2: Which of the following statement about Bryophytes is/are incorrect?

(a) They lack xylem and phloem.
(b) The cell walls of their water conducting cells are lignified.
(c) They exhibit alternating heteromorphic generations.
(d) The sporophyte is usually nutritionally dependent on the gametophyte.


Q3: Which of the following is responsible for peat formation? (AIPMT 2014)
(a) Marchantia
(b) Riccia
(c) Funaria
(d) Sphagnum

Monday 8 October 2018

Class 9 - 12 - Biology - Know About Disease - Brief Notes About AIDS (#cbsenotes)(#eduvictors)

AIDS(A Brief Introduction)

Class 9 - 12 - Biology - Know About Disease - Brief Notes About AIDS (#cbsenotes)(#eduvictors)


Meaning of AIDS

The word AIDS stands for Acquired Immuno Deficiency Syndrome. This means a deficiency of the immune system, acquired during the lifetime of an individual indicating that it is not a congenital disease [disease or abnormality present from birth]. ‘Syndrome’ means a group of symptoms.


AIDS was first reported in 1981 and in the last twenty-five years or so, it has spread all over the world.

Luc Montagnier, Françoise Barré-Sinoussi, and their colleagues at the Pasteur Institute in Paris were the first to report the discovery of the virus now called the human immunodeficiency virus (HIV) associated with AIDS.


Causes of AIDS

Wednesday 19 September 2018

CBSE Class 9 - Cell Biology - 7 Points about Plasmolysis (#cbsenotes)(#eduvictors)

Cell Biology - 7 Points about Plasmolysis


Plasmolysis vs Flaccid vs Turgid
Credits: Wikimedia, Author: LadyOfHats

1. When a living plant cell loses water through osmosis there is shrinkage or contraction of the contents of the cell away from the cell wall. This phenomenon is known as plasmolysis
(plasma → fluid; lysis → disintegration, decomposition).


2. Only living cells, and not dead cells, are able to absorb water by osmosis.


3. Cell walls permit the cells of plants, fungi and bacteria to withstand very dilute [hypotonic] external media without shrinkage.


Tuesday 26 June 2018

CBSE Class 9/ Class 11- Biology - Nehemiah Grew - Father of Plant Anatomy (#PMtNotes)(#cbsenotes)(#eduvictors)

Nehemiah Grew - Father of Plant Anatomy

CBSE Class 9/ Class 11- Biology - Nehemiah Grew - Father of Plant Anatomy (#PMtNotes)(#cbsenotes)(#eduvictors)

Nehemiah Grew (26 September 1641 – 25 March 1712) was an English plant anatomist and physiologist, known as the "Father of Plant Anatomy".

Nehemiah Grew (1641-1712) was practicing physician and worked as the secretary of the Royal Society, London. He began his work on the study of internal structure of the plants in the year 1664.

Sunday 17 June 2018

CBSE Class 11 - Biology - Understanding Plant Growth (#cbsenotes)(#eduvictors)

Understanding Plant Growth

CBSE Class 11 - Biology - Understanding Plant Growth (#cbsenotes)(#eduvictors)


Q1: Define growth.

Answer: Growth in an organism consists of a permanent and more or less irreversible increase in size, commonly accompanied by an increase in dry mass and amount of cytoplasm.


Q2: Define development.

Answer: The coordination of growth and differentiation of a single cell into multicellular tissues and organs is called development.


Q3: How the growth of living beings is different from non-living?

Answer: Growth in living beings is intrinsic or internal, in contrast to extrinsic growth observed in non-living objects.


Q4: How is plant growth different from animal growth?

Answer: Plant growth is generally indeterminate, i.e., continued throughout life while animal growth is non-continuous i.e. after a certain age, the ageing starts leading to death. In plants, the growth is diffused and localised while animal growth is uniform.


Q5: How plant growth is categorised?

Tuesday 24 April 2018

AIPMT/ NEET CLASS 12 - BIOLOGY MCQs (#eduvictors)(#cbsenotes)

NEET/ AIPMT/ CET - BIOLOGY MCQs 

AIPMT/ NEET CLASS 12 - BIOLOGY MCQs (#eduvictors)(#cbsenotes)

1. Unicellular algae, diatoms and protozoans are the members of 

(a) Monera
(b) Fungi
(c) Protista
(d) Plantae

2. Which of the following is also known as ‘amphibian of the plant kingdom’?

(a) Algae
(b) Bryophytes
(c) Pteridophytes
(d) Gymnosperms


3. Yeast is not included in protozoas in fungi because

(a) chlorophyll is absent
(b) it has eukaryotic organisation
(c) cell wall is made up of cellulose and reserve food material as starch
(d) some fungal hyphae grow in such a way that they give the appearance of pseudomycelium


4. An association between roots of higher plants and fungi is called

(a) lichen
(b) fern
(c) mycorrhiza
(d) None of these