Showing posts with label class12-Biology. Show all posts
Showing posts with label class12-Biology. Show all posts

Monday 17 June 2019

CBSE Class 12 Biology - Chapter Biotechnology - Very Short Question Answers (#class12Biology)(#eduvictors)

Class 12 Biology - Chapter: Biotechnology

Very Short Question Answers

CBSE Class 12 Biology - Chapter Biotechnology - Very Short Question Answers (#class12Biology)(#eduvictors)

Q1: Name the molecular diagnostic techniques that should be referred to any patient for early diagnosis. 

Answer:
1) Recombinant DNA technology
2) Polymerisation chain reaction     
3) ELISA 


Q2: Give the term for rDNA, PCR and ELISA have a common value. 

Answer: rDNA, PCR and ELISA are tools of molecular diagnosis 


Q3: Give the term for replacing a defective mutant allele with a functional allele. 

Answer: Gene Therapy


Wednesday 27 March 2019

NEET Pre-Medical Biology Quiz: Biomolecules - Set 4 (#NEETQuiz)(#eduvictors)

NEET Biology Quiz: Bio-molecules

(Set -4)
NEET Pre-Medical Biology Quiz: Biomolecules (#NEETQuiz)(#eduvictors)

MCQs


Q1: Which of the following is a saturated fatty acid?

(a) Oleic Acid
(b) Linoeic Acid
(c) Archidonic Acid
(d) Palmitic Acid


Q2: Essential amino acids include

(a) leucine
(b) valine
(c) tryptophan
(d) all of these



Q3: Many elements are found in living organisms either free or in the form of compounds. One of the following is not found in living organisms.

(a) Silicon
(b) Magnesium
(c) Iron
(d) Sodium

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

Sunday 10 February 2019

CBSE Class 12 - Biology - Biodiversity and Conservation - Questions and Answers(#cbsenotes)(#eduvictors)

Biodiversity and Conservation

Class 12 - Biology  
Questions and Answers
CBSE Class 12 - Biology - Biodiversity and Conservation - Questions and Answers(#cbsenotes)(#eduvictors)


Q1: Defined biodiversity.

Answer: Biologists typically define biodiversity as the “totality of genes, species and ecosystems of an area”. It refers to the sum total of diversity that exists at genetic, species and ecosystem level of biological organisation.


Q2: Who coined the term 'biodiversity'?

Answer: The term was coined by socio-biologist Edward Wilson and was used by Walter G Rosen for the diversity of life forms.


Q3: What are the three inter-related levels of biodiversity?

Thursday 20 December 2018

CBSE Class 12 - Biology Sample Question Paper + Solution- (2018-19)(#cbsenotes)(#eduvictors)

CBSE Class 12 - Biology
 Sample Question Paper + Solution- (2018-19)

CBSE Class 12 - Biology  Sample Question Paper + Solution- (2018-19)(#cbsenotes)(#eduvictors)

Biology is the study of life. All living things share five basic properties, passed down over millions of years from the first organisms to evolve on earth: cellular organization, metabolism, homeostasis, growth and reproduction, and heredity. Life’s organisms interact with each other at many levels, in ways simple and complex. Thus they show hierarchical organization. A variety of processes can produce evolutionary change. Most evolutionary biologists, however, agree with Darwin’s thinking that natural selection is the primary process responsible for evolution. Many such topics are covered in class 12 biology. 

Here follows the class 12  Biology sample question paper along with the marking scheme and answers for your assessment.

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.


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


Sunday 22 April 2018

CBSE CLASS 12 - Biology - Digestion - Five Digestive Juices (#cbsenotes)(#eduvictors)

Digestion - FIVE DIGESTIVE JUICES

CBSE CLASS 12 - Biology - Digestion - Five Digestive Juices (#cbsenotes)(#eduvictors)
Image credits: LadyOfHats (Wikimedia)

There are five digestive juices i.e.

Saliva,

Gastric juice

Pancreatic juice

Intestinal juice (succus entericus)

Bile juice

Sunday 15 April 2018

Class 11/12 - Biology - Classification of Plants (#cbsenotes)(#eduvictors)

Biology - Classification of Plants - Herbs, Shrubs and Trees and Other Types

Class 11/12 - Biology - Classification of Plants (#cbsenotes)(#eduvictors)

Q1: Based on habit i.e. Based on height, duration and nature of stem, how plants are classified?

Answer:
Herbs
Shrubs
Trees


Q2: On the basis of On the basis of flowering frequency, how plants are classified?

Answer:
Monocarpic - These plants flower and fruit only once in their lifetim
Polycarpic - These plants bear flowers and fruits repeatedly.


Q3: On the basis of life span, how plants are classified?

Answer:

Annuals
Biennials
Perennials


Thursday 5 April 2018

CBSE Class 12 / AIPMT / NEET - Biology MCQs

Class 12 / AIPMT / NEET - Biology MCQs 

CBSE Class 12 / AIPMT / NEET - Biology MCQs


Multiple Choice Questions


Q1: Which of the following is a ‘club moss’ ?

(a) Selaginella
(b) Equisetum
(c) Lycopodium
(d) None of these


Q2: The morphological nature of rhizophore of Selaginella is _______

(a) Root like
(b) Stem like
(c) Both root and stem like
(d) Rhizoid like


Q3: Pinus is a _____

(a) Tree
(b) Shrub
(c) Herb 
(d) None of these

Wednesday 22 November 2017

Class 12 - Biology - Human Reproduction System - Very Short Questions and Answers (#cbseNotes)(#eduvictors)

Human Reproduction System - Very Short Questions and Answers

Class 12 - Biology - Human Reproduction System - Very Short Questions and Answers (#cbseNotes)(#eduvictors)

Q1: Define menarche.

Answer:  A female's first menstrual period. It is marked by the maturation of ovaries.


Q2: Which female reproductive system that regulates the condition of the endometrium?

Answer: progesterone.


Q3: What is amenorrhea?

Answer: It is failure to menstruate.


Q4: What is erythroblastosis?

Answer: It is a disease that occurs when the infant’s blood and the mother’s blood are incompatible. It is due to RH factor incompatibility.


Sunday 17 September 2017

CBSE Class 10 - Biology - - Arteries vs Veins (#cbseNotes)

Biology - Arteries vs Veins

Areteries vs Veins
credits: Kelvinsong (Wikimedia) under CC-BY-SA-3.0


Arteries and Veins are parts of closed circulatory system and both carry blood. Here follows the differences between the two:


Wednesday 23 August 2017

CBSE Class 12 - Biology - Human Nutrition (Worksheet) (#cbseNotes)

Human Nutrition (Worksheet)

CBSE Class 12 - Biology - Human Nutrition (Worksheet) (#cbseNotes)
Digestive System
By Mariana Ruiz Villarreal(LadyofHats) (Own work)
[Public domain], via Wikimedia Commons

Fill in the blanks


1. ______________ is a hormone released by the mucosa of duodenum.


2. The process by which the complex food materials are changed to simple molecules is called _______.


3. Trypsinogen in the presence of __________ enzyme breaks into Trypsin + Inactive dipeptides.


4. Bile salts with the help of _________ emulsify fats.


Friday 26 May 2017

CBSE CLASS 12 - Biology - CH 5 - Principles of Inheritance and Variation - Important Definitions (#cbseNotes)

Principles of Inheritance and Variation - Important Definitions


CBSE CLASS 12 - Biology

CBSE CLASS 12 - Biology - CH 5 - Principles of Inheritance and Variation - Important Definitions (#cbseNotes)


Q1: Define heredity.

Answer: It can be defined as the transmission of characters from one generation to successive generations of living organisms.


Q2: Define Alleles

Answer: The various forms of a gene are called alleles.


Q3: What are multiple alleles?

Answer: If a gene has more than two alleles then they are said to be multiple alleles. e.g. In humans ABO blood groups is an example for multiple allelism.


Q4: What is genotype?

Answer: The genetic constitution of an organism is its genotype.


Q5: What is phenotype?

Answer: The external / observable characteristics of an organism constitute its phenotype.

Friday 12 May 2017

CBSE Class 12 - Biology Syllabus and Q Paper Design (2017-18) (#cbseNotes)

Biology -Syllabus (2017-18)


CBSE Class 12

CBSE Class 12 - Biology -Syllabus (2017-18) (#cbsenotes)

Here presents the prescribed syllabus for Class 12 Biology for the curriculum 2017-18.


Saturday 6 May 2017

CBSE Class 12 - Biology - Human Reproduction - Important Terms (#cbsenotes)

Human Reproduction

Important Terms
CBSE Class 12 - Biology 

Male Reproductive System
credits: Wikimedia under CC 3.0


Q1: Define Spermatogenesis.

Answer:  It is the process of production of sperms by immature male germ cells that begins at puberty (Production of sperm).

Q2: Define Spermiogenesis

Answer: It is the process of transformation of spermatids into sperm.


Q3: What is spermiation?

Answer: It is the release of sperms from seminiferous tubule.


Thursday 27 April 2017

CBSE Class 11/12, AIPMT/NEET - Biology - List of Important Proteins and Their Occurrence (#cbsenotes)(#biologynotes)

List of Important Proteins and Their Occurrence



Protein Found Where
Albumin Egg White, Milk, Blood Plasma
Actin Muscle Fibres (Contractile protein)
Collagen Tendon, Bones
Casein Milk, Egg Yolk
Keratin Hair, Horn, feathers, Nail
Cytochrome Mitochondria
Elastin Arteries, Ligaments,Yellow Fibres

Tuesday 25 April 2017

CBSE NEET/AIPMT Class 12 Biology - Animal Nutrition and Digestive System (MCQs) (#cbsenotes)

Animal Nutrition and Digestive System 

(Biology MCQs) For NEET, Pre-Medical and AIPMT  

CBSE NEET/AIPMT Class 12 Biology - Animal Nutrition and Digestive System (MCQs) (#cbsenotes)


Q1 (AIPMT 2014): An alga which can be employed as food for human being is _______.

(a) Ulothrix
(b) Spirogyra
(c) Chlorella
(d) Polysiphonia


Q2: Carrier ions like Na⁺ facilitate the absorption of which of the following substances:

(a) glucouse and fatty acids
(b) amino acids and glucouse
(c) glycerol and fatty acids
(d) fructose and some amino acids


Q3: Which of the following food components reach totally undigested in human stomach?

(a) Protein and Starch
(b) Starch and Fat
(c) Fat and Cellulose
(d) Starch and Cellulose