2024-04-24 15:03
DNA is the genetic
material in all organism; except some RNA viruses. What makes DNA more
efficient than RNA for long term storage of genetic information?
Let’s understand the reasons… Read More
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"A Biology Exam Preparation Portal."
2024-03-21 08:07
Water (H2O) is an inorganic polar compound composed of
molecules of hydrogen and oxygen. The most crucial property for all the other
properties is the polarity of water.
7 properties of wat… Read More
2024-03-06 07:19
The
Central Dogma of molecular biology, proposed by Francis Crick, states that
genetic information flows from DNA to RNA to protein. However, there are
several known exceptions to this rule:… Read More
2024-02-22 09:37
Reverse
transcriptase (RT) is an enzyme that plays a crucial role in the life cycle of
retroviruses, such as HIV. It is the process of synthesizing DNA from an RNA
template.
Discovery:
Reve… Read More
2024-01-12 15:48
What are
Polysaccharides?
Polysaccharides are
long chains of monosaccharides linked by glycosidic bond.
(Poly: many, Saccharides:
sugar units)How are
polysaccharides classified?
Polysacch… Read More
2024-01-12 15:46
What is Respiratory
system?
The respiratory system
is the network of organs and tissues that help in breathing or exchange of
oxygen and carbon dioxide (gas exchange). Breathing involved tw… Read More
2024-01-12 15:02
The chromosome number varies incredibly across different organisms! The diploid chromosome number of chicken is 78 where as humans is 46.Smallest chromosome number in animals is jack jumper… Read More
2023-12-19 17:18
1.A plot of soil contaminated with diesel oil was inoculated with oyster mushrooms. After 4 weeks, more than 95% of the polycyclic aromatic hydrocarbons had been reduced to non toxic comp… Read More
2023-12-19 15:51
1.Leukemia inhibiting factor has been utilized in animal cell culture for Stimulating growth of cellinhibiting differntiation of stem cellsarrest cells at mitosisinducing morphogenesis… Read More
2023-12-17 15:32
1.Which of the following transgenic crops have been approved for commercial cultivation in India? CottonBrinjalCotton and BrinjalCotton, Brassica, Brinjal
2.Which selectable marker gen… Read More
2023-12-17 14:57
1.If we want to obtain glycosylated protein from microbe, suitable choice will be Bacteriayeastmycoplasmaanimal cell
2.Which one of the following microrganisms is used for the ferment… Read More
2023-12-17 14:11
1.Point Mutation in which there is deletion or addition of one pair is termed as deletiontransitiontransversionframe shift mutation
2.The frame shift mutation is induced by Nitrous oxi… Read More
2023-12-17 13:35
1.F-plasmids in bacteria helps in ConjugationReplicationTransductionTransformation
2.Conjugation involves transfer of DNA from one cell to another. In E cloi, the cells that cannot tra… Read More
2023-12-17 07:08
1.Frequency of crossing over is directly proportional toLength of chromosomesNumber of genesDistance between genesNumber of chromosomes
2.In genetic map, distance between two genes is… Read More
2023-12-17 06:43
1.Which one of the following plant hormones use the two-component histidine kinase receptor system for signal transduction?AuxinGibberellinCytokininAbscisic acid
2.Which of the followi… Read More
2023-12-16 11:25
1.The bacteria responsible for nodulation in stems and root of sesbania rostrata?FrankiaAzotobactercAzorhyzobiumBradyhyzobium
2.Free-living nitrogen fixers can survive in different eco… Read More
2023-12-16 09:42
1.The capacity of a system to do work at constant temperture is termed as free energyentropyenthalpychemical potential
2.Which statement is correct for ΔG=0Reaction is in equilib… Read More
2023-12-15 14:47
1.A hapten such as 2,4-dinitrophenol (DNP) is antigenic but not immnunogenicimmunogenic but not antigenicboth antigenic and immunogenicneither antigenic nor immunogenic
2.Which is mos… Read More
2023-12-11 09:38
June 2018December 2018June 2019CSIR-UGC-NET-JRFJune 2015Dec 2015June 2016 Dec 2016 June 2017 Question Paper with answers June 2015June 2013 question paper & Ans… Read More
2023-12-09 02:54
1.Which statement is not true for DNA transcription? Template strand and mRNA have complementary sequencesTemplate strand is used as coding strandtemplate strand is termed as sense strand… Read More
2023-12-09 02:24
1.Cancer cell secretes chemicals such as VEGF for angiogenesis, whose target cells are B cellsCancerous growthPlateletsEndothelial cells
2. In which cancer treatment monoclonal antibodi… Read More
2023-12-08 14:55
1. Among the following live atteneutated vaccine is DiptheriaTetanusSmall poxPoliomycetes
2.Which of the following food crops has recently has genetically engineered to obtain vaccine t… Read More
2023-12-08 14:53
1.Which of the folllowing molecule is released from mitochondria in the process leading to apoptosisApoptosisCancerous growthMutationCell senescence
2. Which of the following protein/enz… Read More
2023-12-08 13:22
1. Origin of replication usually containsGC rich sequencesboth AT and GC rich sequencesno particular stretch of sequencesAT rich sequences
2.Among the following enzyme which is not invo… Read More
2023-12-07 09:53
1. Which of the following materal effect gene products regulate production of anterior structures in Drosophilia embryo?Bicoids and NanosBicoid and HunchbackNanos and CaudalBicoid and Caud… Read More
2023-11-28 15:21
1.1 Curie equal to 3.7x 109Becquerel37x 10 9 Becquerel37x 106 Becquerel3.7x 106 Becquerel
2.Among the following which radioisotope is not a Betta emitter?C14I 125P32H3
Learn more:
Micr… Read More
2023-11-28 15:13
1.Which one of the following would contribute to intrinsic fluorescence to a protein disulphide bondsaromatic amino acidsCharged amino acidsbranched chain amino acids
2.Which one of the… Read More
2023-11-28 14:47
1.In western blotting based HIV diagnosis technique, the patient sample is screened for AntigenAntibodyVirusVirus outer coat protein
2.Which one of the following analytical techniques d… Read More
2023-11-28 11:20
Francis Galton known as father of biostatisticsMeasures of Central Tendency: Average, Mean, Median and ModeStastics of Dispersion: Mean deviation, Standard deviation and VarianceMean de… Read More
2023-11-28 07:40
1.Variation in two characters in two or more species can be best represented byHistogramLinear curveScattered diagramTriangular box
2.Which one of the following statements regarding nor… Read More
2023-11-28 06:27
1.Chromosomes of Yeast and Protozoa are best separated using ?Visible microscopyElecton microscopy PAGEPulse Field Gel Electrophoresis
2.DNA Fragment between size 2000 KD and 500 Kd ca… Read More
2023-11-28 06:26
1.Minimum resolution of electron microscope is 0.2nm20nm0.2mm100nm
2.In electron microscopy, to dect specific macromolecule or structure such as spindle pole body (SPB),the frequently u… Read More
2023-11-27 17:03
Question: In remote sensing, Which one of the following formulae is used for the calculation of normalized difference vegetation Index (NDVI)?1. RED / (NIR+RED)2. RED / (NIR-RED)3.(NIR+… Read More
2023-11-27 15:24
🎯Electroencephalography: Brain activity recordingAn electroencephalogram (EEG) is a test that measures electrical activity in the brain using small, metal discs (electrodes) att… Read More
2023-11-21 18:05
1. A pedigree depicting the inheritance of a trait in a family is shown. The trait represented is:
Autosomal dominantAutosomal recessiveY-linkedX-linked recessive
2.Separation of DNA… Read More
2023-11-16 07:35
Spectroscopy is a technique used for the study of interaction of electromagnetic radiation with matter. It is used for the identification of substances through the spectrum emitted from or a… Read More
2023-11-07 05:39
Storage polysaccharides and structural polysaccharidesDepending on the functional roles played by homopolysaccharides are divided into storage polysaccharides and struct… Read More
2023-11-04 17:49
Algae Read More
2023-11-04 14:59
The first level of classification among plants depends on whether the plant body has well differentiated, distinct parts. The next level of classification is based on whether… Read More
2023-11-03 14:39
2023-11-03 14:02
2023-11-03 01:47
Official Notification: Instructions and Procedure for online submission of Application FormApply NowLife Sciences: The candidate is required to answer a maximum of 15, 35 and 25
q… Read More
2023-10-31 13:41
Enzymes were first discovered by Edward Buchner in 1897. He found that even an extract from the yeat cells could ferment glucose. He named those factors in the yeast responsible for fe… Read More
2023-10-30 06:42
Major Phyla:Porifera Coelenterata (Cnidaria)CtenophoraPlatyhelminthesAschelminthesAnnelidaArthropodaMolluscaEchinodermataHemichordataChordata1. Phylum PoriferaCommonly called spon… Read More
2023-10-27 08:56
A
special branch of science which applies biotechnology
to study the natural environment, identifying optimum,
but sustainable uses of plants, animals and microorganisms to develop gr… Read More
2023-10-27 07:24
Gene therapy, this technology is most helpful in the treatment of diseases caused by gene
defects such as cystic fibrosis, thalassemia, Parkinson’s disease, etc.
Conceptualised i… Read More
2023-10-26 14:54
• Biotechnology refers to the different technologies that
make use of living cells and/or biological molecules to
generate useful products for the benefit of mankind. • T… Read More
2023-10-26 14:52
• Millions of tasks performed by our body become possible
due to the presence of ‘cell’, which is the ‘basic unit of
life’. Cells can be broadly categorised… Read More
2023-10-26 13:33
• Simple light microscopy enables us to see things that are
otherwise too small to be observed by our naked eyes.
Studying minute details of internal organisation of cells
is so very di… Read More
2023-10-26 13:31
Haploid cells have only one copy of the chromosome while
diploid cells have two copies of the same chromosome. • Any deviation where one or few chromosomes are either
absent… Read More
2023-10-24 12:56
What are
bacteriophages?
The word
"bacteriophage" literally means "bacteria eater," because
bacteriophages destroy their host bacterial cellBacteriophages
are viruses that infect bacteria… Read More
2023-10-24 08:26
Class 11 BiotechnologyUnit I: An Introduction to Biotechnology
Chapter 1: Introduction
1.1 Historical Perspectives
1.2 Applications of Modern Biotechnology
1.3 Biotechnology in India: A… Read More
2023-10-24 08:09
• Carbohydrates are made up of carbon, hydrogen and
oxygen atoms, and are widely distributed in animal and
plant tissues. • Carbohydrates are categorised into 4 maj… Read More
2023-10-24 08:04
• Enzymes are catalysts that catalyse the biochemical
reactions in the living system. • Each enzyme has an active site into which the substrate
molecule fits precisely. The &l&hell…Read More
2023-10-24 07:59
• All cells respond to signals in their environment through
specific receptors which can either be located on the cell
surface or present inside the cytoplasm or the nucleus.
A li… Read More
2023-10-24 07:53
• Characteristics that run in families have a genetic basis,
meaning that they depend on genetic information that a
person inherits from his or her parents. This is true for all
pl… Read More
2023-10-24 07:47
• DNA was, for the first time, isolated from nuclei of pus
cells by Johann Friedrich Miescher in 1869. • The phenomenon of transfer of genetic material from
one cell to a… Read More
2023-10-24 07:32
Protein Informatics and Cheminformatics• Protein informatics is a growing field of information
technology in which information about any protein is
collected using sophisticated techniq… Read More
2023-10-24 07:04
An Overview of Recombinant
DNA TechnologyThe methods used for manipulating nucleic acid/
genome (DNA) of an organism are collectively referred
to as recombinant DNA (rDNA) technology o… Read More
2023-10-24 07:00
• Isolation of nucleic acids from different organisms is the
most essential requirement for any molecular biology
experiment. There are four steps in the process of
extractio… Read More
2023-10-24 06:58
•To study and compare the inherited variations in human
DNA without sequencing, a new technique, known as ‘DNA
fingerprinting’ was developed by Sir Alec Jeffreys in 1984 at… Read More
2023-10-24 06:50
• The genome of an organism is the complete DNA content,
which includes DNA present in the nucleoid in prokaryotes
and the DNA present in the chromosomes of the nucleus,
mito… Read More
2023-10-18 15:11
2023-10-18 14:54
Glass frogs. These fascinating creatures get their name from their translucent skin, which allows us to see into their bodies and observe their inner workings.The glass frog family, Ce… Read More
2023-10-15 15:01
Contents of Class XI SyllabusUnit 1: Diversity in Living WorldWhat is living?; Biodiversity; Need for classification; Three domains of life; Taxonomy & Systematics; Conce… Read More
2023-10-15 15:00
Contents of Class XII SyllabusUnit 6: ReproductionReproduction in organisms: Reproduction, a characteristic feature of all organisms for continuation of species; Modes… Read More
2023-10-15 14:56
NCERT Text BookNCERT Biology -Class 11NCERT Biology -Class 12NEET UG Syllabus 2024 Read More
2023-10-12 15:38
2023-10-12 14:46
Muscular dystrophyMuscular dystrophy is a group of genetic disorders that cause progressive muscle weakness and degeneration. It affects both males and females and can manifest in early chil… Read More
2023-10-08 02:25
2023 Nobel Prize in Physiology or Medicine was jointly
awarded to KATALIN KARIKÓ And DREW WEISSMAN “for their discoveries concerning nucleoside base
modifications that enab… Read More
2023-10-05 01:35
Lion: A large carnivorous feline known for its majestic mane and fierce roar.Elephant: A massive mammal with a long trunk used for drinking, eating, and communication. African elephant… Read More
2023-10-02 08:11
GATE Life Science Previous Question Papers Read More
2023-10-02 08:10
GATE Ecology and Evolution Syllabus 2024GATE -Ecology and Evolution Question Papers Read More
2023-10-02 08:08
GATE Biotechnology Syllabus 2024
GATE -Biotechnology Previous Year Question PapersGATE -Biotechnology - Chapter wise Previous Questions Read More
2023-10-01 03:10
Definition: A karyotype is an individual’s complete set of chromosomes. The term also refers to a laboratory-produced image of a person’s chromosomes isolated from an… Read More
2023-09-28 13:02
What the world is more
prone to epidemics?
With more frequent
travel, globalization, globalized trade and greater interconnectedness between countries,
infectious disease outbreaks of… Read More
2023-09-23 02:46
Cell Analogy to
factory
Cell is the basic
structural and functional unit of life. The easiest way to understand cell
structure and function is to compare and visualize cell with some famili… Read More
2023-09-23 02:31
How neurons "talk" to
each other?Neurons communicate
with each other through electrical and chemical signals. Our brain has
approximately 80 billion nerve cells, called neurons. Neurons talk… Read More
2023-09-20 08:46
The kingdom protista includes eukaryotic microorganisms, They are uni-cellular and generally aquatic. On evolutionary point of view this kingdom acts as a link between prokaryotic mone… Read More
2023-09-17 08:39
Manta rays are close relatives of all sharks and rays, meaning they have a skeleton made of cartilage rather than bone. Mantas are found in warm temperate, subtropical and tropical wat… Read More
2023-09-16 06:56
The red panda (Ailurus fulgens) is a bear-like creature with thick russet fur that is slightly larger than a domestic cat. The abdomen and limbs are black, while the side of the head an… Read More
2023-09-16 01:15
The Montreal Protocol is an international treaty established in 1987 to protect the Earth's ozone layer. It is widely regarded as one of the most successful environmental agreements in… Read More
2023-09-16 01:01
The ozone layer, a delicate gas shield, shields the Earth from the sun's damaging radiation, thereby preserving life on the planet. The phaseout of controlled uses of ozone depleting substan… Read More
2023-09-13 06:21
Phylum Platyhelminthes (Gr.platys, flat+ helminthes, worm) includes
worms with a flat body. This phylum includes about 13,000 species. Animals with
elongated bodies but no conspicuous a… Read More
2023-09-12 08:31
The phylum Ctenophora
takes its name from two Greek words, ktenos= comb and phora= bearing, as they
possess eight combs like plates of locomotion. Ctenophora is a small phylum of
marine anim… Read More
2023-09-11 15:38
🪸Why are coral reefs important? Coral reefs cover less than 0.1% of the
earth’s surface, but they are the most biodiverse marine ecosystem in the
world.
Coral reefs are h… Read More
2023-09-10 12:10
What is Bacterial Growth Curve?The bacterial growth curve is a graphical representation that shows the number of live cells in a bacterial population over a period of time when cultured in a… Read More
2023-04-06 04:00
IIT JAM Biotechnology Syllabus IIT JAM Biotechnology Question Paper Set 2012-2022 Read More
2023-04-05 15:49
GATE Environmental Science and Engineering (ES) Syllabus
Question Papers20212022 Read More
2023-04-05 15:40
2023-04-05 15:38
GATE Ecology & Evolution (EY) Syllabus
Question Papers2014-2019 (6 Question Papers Set)202020212022 Read More
2023-04-05 15:32
Question Papers2011-2019 (9 Question Paper Set)202020212022 GATE Life sciences (XL) Syllabus Read More
2023-04-05 15:18
GATE Biotechnology (BT) SyllabusQuestion Papers2010- 2019 (10 Question Paper Set)202020212022 Read More
2023-04-05 14:59
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