A highly experimental and controversial technique involving egg from two mother and sperm from a father has opened up a new way to have children without the metabolic disorder, due to the faulty mitochondrial DNA, being passed on from the mother with mutated DNA of the mitochondria. The first baby was born on the 6th of April last year and is not showing any symptom of the metabolic disorder as of now.
Gene therapy is when DNA is introduced into a patient to treat a genetic disease. The new DNA usually contains a functioning gene to correct the effects of a disease-causing mutation. Gene therapy uses sections of DNA? (usually genes?) to treat or prevent disease. The DNA is carefully selected to correct the effect of a mutated gene that... Continue Reading →
The ‘Central Dogma’ is the process by which the instructions in DNA are converted into a functional product. It was first proposed in 1958 by Francis Crick, discoverer of the structure of DNA. The central dogma of molecular biology explains the flow of genetic information, from DNA ?to RNA?, to make a functional product, a protein?. The central dogma suggests... Continue Reading →
Genes are small sections of DNA within the genome that code for proteins. They contain the instructions for our individual characteristics – like eye and hair colour. A gene is a small section of DNA? that contains the instructions for a specific molecule, usually a protein?. The purpose of genes? is to store information. Each gene contains the information required... Continue Reading →
Chromosomes are bundles of tightly coiled DNA located within the nucleus of almost every cell in our body. Humans have 23 pairs of chromosomes. In plant and animal cells, DNA? is tightly packaged into thread-like structures called chromosomes?. This is in contrast to bacteria? where DNA floats freely around the cell. A single length of DNA is wrapped many times... Continue Reading →
DNA fingerprinting is a method used to identify an individual from a sample of DNA by looking at unique patterns in their DNA. Background Almost every cell? in our body contains our DNA?. On average, about 99.9 per cent of the DNA between two humans is the same. The remaining percentage is what makes us unique (unless you... Continue Reading →
General Instructions: There will be an Annual examination based on entire syllabus. The annual examination will be of 80 marks and 20 marks weightage shall be for internal assessment. Out of 80 marks annual examination 68 marks weightage shall be for theory and 12 marks weightage shall be for practical based questions. For internal assessment:... Continue Reading →
Electrophoresis is a technique commonly used in the lab to separate charged molecules, like DNA, according to size. Gel electrophoresis is a technique commonly used in laboratories to separate charged molecules like DNA?, RNA? and proteins?according to their size. Charged molecules move through a gel when an electric current is passed across it. An electric current is applied across... Continue Reading →
List of practicals and evaluation scheme for CBSE class-XI biology as per the latest curriculum released by CBSE at cbseacademic.in . Practicals Maximum Marks : 30 Evaluation Scheme Marks One Major Experiment Part A (Expt. No. 1, 3, 7, 8) 5 One Minor Experiment Part A (Expt. No. 6, 9, 10, 11, 12, 13) 4 Slide Preparation Part A (Expt No. 2, 4, 5) 5 Spotting Part B 7 Practical Record + Viva Voce 4 Project Record + Viva Voce 5 Total 30 A. List of Experiments Study and description of three locally available common... Continue Reading →
List of practicals and evaluation scheme for CBSE class-XII biology as per the latest curriculum released by CBSE at cbseacademic.in . Practicals Maximum Marks : 30 Evaluation Scheme Marks One Major Experiment Part A 5 One Minor Experiment Part A 4 Slide Preparation Part A 5 Spotting Part B 7 Practical Record + Viva Voce 4 Project Record + Viva Voce 5 Total 30 A. List of Experiments Study pollen germination on a slide. Collect and... Continue Reading →
Course Structure (2017-18) Unit Title No. Of Periods Marks VI Reproduction 30 14 VII Genetics and Evolution 40 18 VIII Biology and Human Welfare 30 14 IX Biotechnology and its Applications 30 10 X Ecology and Environment 30 14 Total 160 70 Unit-VI : Reproduction (30 periods) Chapter-1: Reproduction in Organisms Reproduction, a characteristic feature of all organisms... Continue Reading →
Course Structure (2017-18) Unit Title No. Of Periods Marks I Diversity of Living Organisms 23 7 II Structural Organisation in Plants and Animals 22 12 III Cell: Structure and Function 35 15 IV Plant Physiology 40 18 V Human Physiology 40 18 Total 160 70 Unit-I : Diversity of Living Organisms (23 Periods) Chapter-1: The Living World What is living? Biodiversity; Need for classification; three domains of life; taxonomy and systematics;... Continue Reading →
Coordination It is the process through which two or more organs interact and complement the functions of one another. Neuron Highly specialized cells which can detect, receive and transmit different kinds of stimuli. Stimuli A stimulus causes an action or response, in an organism. It can be external (temperature, light, etc. ) or internal (hunger, thirst,... Continue Reading →
This post contains all the abbreviations used and its expansion, in the Biology NCERT Text Book of Class XII.
Nutrition Process of taking in and utilizing various types of foods by organisms, for obtaining energy necessary for growth and development. Autotrophs Organisms who can synthesize their own organic food from simple inorganic sources. Heterotrophs Organisms that cannot prepare its own food and depends upon other for its nutritional requirements. Enzymes These are the biological... Continue Reading →
You've probably heard of the human genome, the huge collection of genes inside each and every one of your cells. You probably also know that we've sequenced the human genome. But what does that actually mean? How do you sequence someone's genome? Let's back up a bit. What is a genome? Well, a genome is... Continue Reading →