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

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

Monday 10 April 2017

Biology - Famous Indian Biologists (AIPMT/NEET/NTSE) (#ntse)(#neet)

Famous Indian Biologists

 Biology - Famous Indian Biologists (AIPMT/NEET/NTSE) (#ntse)(#neet)


Father Of India Bryology (Bryphytes) : Shiv Ram Kashyap

Discovered recurrent annual wheat rust on Indian Plants : K C Mehta

Father of Indian Palynology : P K Nair

Father of Indian Ecology : Ram Deo Mishra

Father of Indian Plant Embryology : Panchanan Maheshwari

Father of Indian Paleobotany : Birbal Sahani

Father of Indian Plant genetics : B P Pal

Sunday 2 April 2017

CBSE Class 12 - Biology - Chapter - Genetics (MCQs for AIPMT/NEET) (#cbsenotes)

Genetics 

CBSE Class 12 - Biology - Chapter - Genetics (MCQs for AIPMT/NEET) (#cbsenotes)

CBSE Class 12 - Biology - 
(MCQs for AIPMT/NEET)


Q1: Removal of introns and joining the exons in a defined order in a transcription unit is called

(a) Splicing
(b) tailing
(c) transformation
(d) capping


Q2: Klinefelter’s syndrome is indicated by an XXY sex chromosome combination. This abnormality is due to:

(a) gene deletion.
(b) gene duplication.
(c) gene translocation.
(d) non-disjunction.


Q3: Molecular basis of organ differentiation relies on modulation in transcription by

(a) RBA polymerase
(b) ribosome
(c) anticodon
(d) transcription factor

Thursday 23 March 2017

CBSE Class 11/12 - Biology - Environmental Biology (MCQs for AIPMT/NEET)

Environmental Biology 

CBSE Class 11/12 - Biology - Environmental Biology  (MCQs for AIPMT/NEET)

(MCQs for AIPMT/NEET)

Q1: Green-house effect is warming due to

a) infra-red rays reaching the earth
b) moisture layer in atmosphere
c) increase in temperature due to increase in carbon dioxide concentration of atmosphere
d) ozone layer of atmosphere


Q2: The relation between algae and fungi in a lichen is 

a) symbiosis
b) parasitism
c) commensalism
d) protocooperation


Q3: Major aerosol pollutant in jet plane emission is

a) Sulphur dioxide
b) carbon monoxide
c) methane
d) chlorofluoro-carbons

Monday 20 February 2017

CBSE Class 11/12/NEET/AIPMT Plants Of Interests Having Specific Features (#neet)(class11biology)(#biologyquiz)(#cbsenotes)

Plants Of Interests Having Specific Features

CBSE Class 11/12/NEET/AIPMT Plants Of Interests Having Specific Features (#neet)(class11biology)(#biologyquiz)(#cbsenotes)
Plants Of Special Interests
(image credits: wikipedia)

Very Short Q & A


Q1: Name the largest Angiosperm.

Answer: Eucalyptus sps.


Q2: Name the smallest Angiosperm.

Answer: Lemma


Q3: Name the Largest seed.

Answer: Lodoicea


Q4: Which plant has the largest leaf?

Answer: Victoria amazonica


Q5: Name the biggest orchid.

Answer: Grammato phyllum speciosum


Sunday 4 December 2016

CBSE Class 11/AIPMT - Plant Nutrition (MCQs)

Plant Nutrition

Biology Quiz
CBSE Class 11/AIPMT - Plant Nutrition (MCQs)
Azolla - an aquatic fern has Nitrogen Fixing capability

MCQs for AIPMT/CEET/Pre Medical


Q1: Nitrifying bacteria converts

(a) atmospheric nitrogen into soluble forms
(b) convert ammonia to nitrate
(c) ammonia to nitrogen
(d) nitrate to nitrogen.


Q2: Amino acids are mostly synthesized from

(a) mineral acids
(b) fatty acids
(c) volatile acids
(d) alpha-ketoglutaric acid


Q3: Which of the following is a micro-nutrient for plants?

(a) Pottassium
(b) Iron
(c) Iodine
(d) Zinc


Q4: If a plant’s younger leaves are yellowing but older one remains green, what could be the most probable cause of plant’s blight?

(a) Improper sunlight
(b) Lack of nitrogen fixing bacteria in soil
(c) Deficiency of immobile mineral nutrient
(d) Deficiency of mobile mineral nutrient


Q5: Enzyme involved in nitrogen assimilation is ___________.

Saturday 19 November 2016

CBSE Class 11/ Class 12/ NEET - Biology - Kingdom Fungi (MCQs)

Kingdom Fungi 

CBSE Class 11/ Class 12/ NEET - Biology - Kingdom Fungi (MCQs)
Fungus, Mushroom
credits: Copyright Pam Brophy

MCQs for AIPMT, PreMedical, NEET


Q1: Black rust of wheat is caused by ________

(a) Puccinia
(b) Mucor
(c) Aspergillus
(d) Rhizopus


Q2: Adhesive pad of fungi enters into the host with the help of

(a) mechanical pressure and enzymes
(b) hooks and suckers
(c) softening by enzymes
(d) only by mechanical pressure


Q3: Which fungal disease spreads by seed and flowers?

(a) Corn stunt
(b) Loose smut of wheat
(c) Covered smut of barely
(d) Soft rot of potato


Q4: Zygospores are formed in

(a) Puccinia
(b) Penicillium
(c) Alternaria
(d) Rhizopus.


Wednesday 2 November 2016

CBSE Class 12 - NEET - Biology - The Living World (MCQs)

Biology - The Living World

CBSE Class 12 - NEET - Biology - The Living World (MCQs)


7 MCQs from previous AIPMT/NEET question papers



Q1: The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for

(a) responsiveness to touch
(b) interaction with the environment and progressive evolution
(c) reproduction
(d) growth and movement



Q2: There is no life on the moon due to the absence of 

(a) oxygen
(b) water
(c) light
(d) temperature



Q3: Praying Mantis is the example of 

(a) warning coluration
(b) social insects
(c) camouflage
(d) Mullerian mimicry