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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1051. |
Difference between chromatin, chromatid and chromosome |
| Answer» ChromatinIt is the DNA and proteins that make up chromosomes.Chromosomes are the seperate pieces of DNA in a cell ( made up of chromatin )Sister chromatids are identical pieces of DNA held together by a centromere and pulled apart during cell division to make new identical chromosomes in newly made cells | |
| 1052. |
What are factor affecting the rate of diffusion |
| Answer» Diffusion\xa0can occur across partialy permeable membranes, such as those surrounding cells. Therefore,\xa0diffusion\xa0is involved in the movement of\xa0important\xa0molecules into and out of cells. It is\xa0important\xa0for the uptake of substances needed by cells, and also the removal of waste products produced by the cells.\xa0The\xa0diffusion\xa0of chemicals and gases in and out of cells is an essential activity in human organs.\xa0Diffusion\xa0of oxygen and carbon dioxide gas\xa0occurs\xa0in the lungs.\xa0Diffusion\xa0of water, salts, and waste products\xa0occurs\xa0in the kidneys.\xa0Diffusion\xa0of calcium from food into cells\xa0occurs\xa0in the intestines. | |
| 1053. |
How occure light and dark reaction in plant |
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Answer» https://www.toppr.com/guides/biology/photosynthesis-in-higher-plants/light-reaction/. Bhai here you can understand easily.... The light reaction of light dependent reaction occurs in the chloroplast of the mesophyll cells of the leaves. The chloroplasts are double-membraned cell organelles that are comprised of stacked disc-like structures known as thylakoids. The pigment, chlorophyll, which is required for the process is present on the membrane of these thylakoids and this is where the light reaction occurs.The Steps Involved in the Light ReactionThe main purpose of the light reaction is to generate organic energy molecules such as ATP and NADPH which are needed for the subsequent dark reaction.Chlorophyll absorbs the red and blue segment of the white light and photosynthesis occurs most efficiently at these wavelengths.When the light falls on the plant, the chlorophyll pigment absorbs this light and electrons in it gets excited.This process occurs in a complex protein system which is collectively called as a photosystem. There are two closely linked photosystems known as PSI and PSII.The chlorophyll pigments which are excited give up their electrons and to compensate for the loss of electrons, water is split to release four H+ ions and four electrons and O2. The electrons that are lost from the PSII enter into an electron transfer chain or ETC.The electrons finally reach the reaction centre where they combine with NADP+ and reduce it to NADPHWhile the electrons are taken care of, the built up of H+ ions inside the thylakoid lumen is of equal importance.The hydrogen ions building up inside the lumen creates a positive gradient and in the presence of the enzyme ATP synthetase, these H+ ions combine with the ADP in the nearby region to form ATP.The oxygen that is a waste product is released by the plant into the atmosphere and some of it is used in photorespiration if the plant needs to.To summarise the light reaction, we can write it down as the following reaction:2H2O + 2NADP+ + 3ADP + 3Pi → O2 + 2NADPH + 3ATPFor any plant performing photosynthesis, four factors influence this process. CO2, water, light, and chlorophyll are the raw materials for photosynthesis. But, in case of light dependent reaction or light reaction of photosynthesis, it is most influenced by presence or absence of light. The other three factors do not play a critical role in it. The "light-independent" or dark reactions happen in the stroma of the chloroplasts. This is also known as the Calvin Cycle. Since these processes can only happen in the chloroplast (a chlorophyll filled plastid in green plants), photosynthesis "light reaction" "light dependent" can only happen in green plants! |
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| 1054. |
Morphology |
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| 1055. |
What is the smallest unit of classificatino |
| Answer» Species is the smallest unit of classification . | |
| 1056. |
Draw a neat diagram of digestive system of frog? |
| Answer» You can see from ncert | |
| 1057. |
What is autocatalytic reaction explain with example |
| Answer» A single chemical reaction\xa0is\xa0said to be\xa0autocatalytic\xa0if one of the reaction products\xa0is\xa0also a catalyst for the same or a coupled reaction. Such a reaction\xa0is\xa0called an\xa0autocatalytic\xa0reaction.\xa0A\xa0set\xa0of chemical reactions can be said to be "collectively autocatalytic" if a number of those reactions produce, as reaction products, catalysts for enough of the other reactions that the entire set of chemical reactions is self-sustaining given an input of energy and food molecules. | |
| 1058. |
Main organ of digestive system |
| Answer» Alimentary canal and digestive organs . Alimentary canal consists of oesophagus , stomach , intestine and some other parts. | |
| 1059. |
What are the significance of Meiosis |
| Answer» 1.Occurs only in reproductive cells. 2.chromosome number reduces to half, i.e haploid,hence called reducational division. 3.consists of two subdivision: meiosis 1and meiosis 2,each involving four phases. Prophase1 is further subdivided into five substages. 5 crossing over takes place. 6.Daughter cell chromosomes contain combined components of both parents,i.e genetic variability occurs. | |
| 1060. |
List any four withdrawl symptoms when regular dose is not provided to an addicted person |
| Answer» Every drug is different. Some substances — alcohol and opioids among the most popular — give way to significant withdrawal symptoms, such as sweating or nausea. Other substances, such as cocaine and marijuana, often produce emotional symptoms, from irritability to\xa0depression.These manifestations can last a few days to a few months. The severity can range from mild and uncomfortable to chronic and life-threatening, based on the person’s age, physical and psychological characteristics, duration of use and the type of drug. | |
| 1061. |
Can any one provide me half yearly question paper of kv..please its my humble request to all |
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| 1062. |
Brown stem trees example |
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| 1063. |
Sabhi Chapter from Chapter 1 to Chapter 22 Biology ke Important Topics Bhejo koi... Please |
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Answer» Jitne bhi Heading hai..unhey samajh lo...or bold words k definitions learn karlo...It will be more than enough..agar whole heartedly padhoge to Sab importent topics h |
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| 1064. |
What is the food enters in the intestine from stomach is called? |
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Answer» Yes you are right....? Yaa it is... Chyme is it ? or not ? |
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| 1065. |
What is s phase |
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Answer» This phase comes under interphase , and just after G1 phase. In this phase, replication of DNA takes place and DNA gets double in this phase. Its synthesis phase.. |
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| 1066. |
What is the different between cancer , blood cancer,skin cancer |
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| 1067. |
Define hetrospair give two examples of hetrospair plants |
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| 1068. |
All enzymes are proteins but all proteins are not enzymes. Justify. |
| Answer» this can be justified as... 1. All enzymes do not follow the Michaelis Menten hypothesis 2. RNAs act as ribozymes 3. Antibodies take part in the catalysis of many reactions 4.Metals are involved in attachment to enzymes and catalysts. | |
| 1069. |
Saare new students aagye ya abhii bhii meko koiii jaanta h yha.!!? |
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Answer» Haa jante h bilkul shayad.. ? |
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| 1070. |
Characteristics of gymnosperms |
| Answer» ✴️Gymnosperms are those plants in which the ovules are not enclosed inside the ovarywall and remain exposed before and after fertilisation.✴️ They are heterosporous, produce haploid microspore and megaspore in male andfemale Strobili respectively.✴️ Male and female gametophytes do not have independent free-living existence.✴️ Pollination occurs through air and zygote develops into embryo and ovules into seeds.These seeds are naked.✴️ Example- Pines, Cycus, Cedrus, Ginkgo, etc. | |
| 1071. |
Finally my exams are finished........?? |
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Answer» But my exams started from Monday A good news Sahi mein complete ho gya mera bhi complete ho gya Wow yr congratulations yrr. ? |
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| 1072. |
WHAT IS BRACT |
| Answer» The reduced leaf like structure present at the base of the pedicel is called BRACT | |
| 1073. |
What is BRACT?? |
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| 1074. |
Write the process and removal of nitrogenous waste material in human? |
| Answer» In shortby kidney..by evaporation in body...by sweating...by feacation process... | |
| 1075. |
What will happen if the chest bone is removed |
| Answer» If our chest bones are removed then there is no protection for our lungs and heart | |
| 1076. |
Define protein with its components in 5 marks |
| Answer» A\xa0protein\xa0is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds.\xa0Proteins\xa0are present in all living organisms and include many essential biological compounds such as enzymes, hormones, and antibodies.\xa0The building blocks of\xa0proteins\xa0are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable\xa0component called\xa0a side chain. | |
| 1077. |
Which phyla are asymmetrical in symmetry? |
| Answer» Porifera....( Sponges ) | |
| 1078. |
Cytoskeleton |
| Answer» It is a network of filamentous proteinaceous structure present in the cytoplasm. The main function of the cytoskeleton is to provide mechanical support, motility, maintenance of the shape of the cell. There are three types: microfilaments, microtubules and intermediate filament. | |
| 1079. |
Give one example of continuous variations and discontinous variations . |
| Answer» A characteristic of any species with only a limited number of possible values shows\xa0discontinuous variation\xa0. Human blood group is an\xa0example of discontinuous variation. ... There are no values in between, so this is\xa0discontinuous variation.\xa0Continuous variation\xa0is the combined effect of many genes (known as polygenic inheritance) and is often significantly affected by environmental influences.\xa0Examples of continuous variation\xa0include things like a person\'s height and weight.\xa0Examples\xa0of\xa0discontinuous variation\xa0include a person\'s blood group or the color of a species of bird. These\xa0variations\xa0can exist for two major reasons. | |
| 1080. |
List major regions of human small intestine in proper sequence |
| Answer» Deudenom Jejenum Ileum | |
| 1081. |
What will happen in te respiration process if we remove the chest bone.. |
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| 1082. |
What is turgid pressure? |
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Answer» The force exerted by the fully hydrated or water filled cell to its plasma membrane .....is called turgid pressure?? The force whichthe cell pushes the plasma membrane against the cell wall |
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| 1083. |
Are kendriya vidyalayas sample paper available here |
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| 1084. |
I want to submit papers how i can |
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| 1085. |
What is pseuodopodia |
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Answer» false feet of unicellular organissm The false boundary of amoeba |
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| 1086. |
Write modification of root and stem for food storage |
| Answer» * Root ~ carrot , radish , beetroot etc.* Stem ~ potato , turmeric , ginger etc.* Leaves~ Onion , garlic etc.....?? | |
| 1087. |
Describe the T.s. of dicot and monocot leaf |
| Answer» Monocot Vs. DicotMonocots differ from dicots in four distinct structural\xa0features: leaves, stems, roots and flowers.\xa0But, the differences start from the very beginning\xa0of the plant\'s life cycle: the seed. Within the seed lies the plant\'s embryo. Whereas monocots have one cotyledon (vein), dicots\xa0have two. This small difference at the very start of the plant\'s life cycle leads each plant to develop vast differences.\xa0Monocots tend to have “fibrous roots”\xa0that web off in many directions. These fibrous roots occupy the upper level of the soil in comparison to dicot root structures that dig deeper and create thicker systems.Dicot roots also contain one main root called the taproot,\xa0where other, smaller roots branch off.\xa0Despite the type of plant,\xa0roots are essential to the plant’s growth and survival, therefore encouraging a deeper and more extensive root system that can help increase the health of the plant.The way a stem develops is important to note. Stems are in charge of supporting the entire plant and help position it to reach as much sunlight as possible. The vascular tissue within the stem can be thought of as a circulatory system for bringing nutrients to each portion of the plant.Both monocots and dicots form different\xa0leaves.\xa0Monocot leaves are characterized by their parallel veins,\xa0while\xa0dicots form “branching veins.”Leaves are another important structure of the plant because they are in charge of feeding the plant and carrying out the process of photosynthesis.\xa0\xa0 | |
| 1088. |
Describe reproductive whorls of flower |
| Answer» In botany, a\xa0whorl\xa0or verticil is an arrangement of leaves, sepals, petals, stamens, or carpels that radiate from a single point and surround or wrap around the stem or stalk. A leaf\xa0whorl\xa0consists of at least three elements; a pair of opposite leaves is not called a\xa0whorl.\xa0A typical flower has four main parts—or whorls—known as the calyx, corolla, androecium, and gynoecium.\xa0The outermost whorl of the flower has green, leafy structures known as sepals. The sepals, collectively called the calyx, help to protect the unopened bud. The second whorl is comprised of petals—usually, brightly colored—collectively called the corolla. The number of sepals and petals varies depending on whether the plant is a monocot or dicot. In monocots, petals usually number three or multiples of three; in dicots, the number of petals is four or five, or multiples of four and five. Together, the calyx and corolla are known as the\xa0perianth. The third whorl contains the male reproductive structures and is known as the androecium. The\xa0androecium\xa0has stamens with anthers that contain the microsporangia. The innermost group of structures in the flower is the\xa0gynoecium, or the female reproductive component(s). The carpel is the individual unit of the gynoecium and has a stigma, style, and ovary. A flower may have one or multiple carpels.If all four whorls (the calyx, corolla, androecium, and gynoecium) are present, the flower is described as complete. If any of the four parts is missing, the flower is known as incomplete. Flowers that contain both an androecium and a gynoecium are called perfect, androgynous or hermaphrodites. There are two types of incomplete flowers: staminate flowers contain only an androecium, and carpellate flowers have only a gynoecium\xa0 | |
| 1089. |
What is tepal ? |
| Answer» Sometimes in some flowers like lily the petals and sepals are not properly distinguished ....or look similar then they are called " Tepals"..? | |
| 1090. |
What is triploblast and diploplast |
| Answer» The animals in which cells are arranged in two embryonic layer, external ectodermand internal endoderm are called diploblastic. Eg. Porifera and Cnidaria..... The animals in which developing embryo has a third germinal layer, mesodermbesides ectoderm and endoderm are called triploblastic. Eg. Platyhelminthes,Chordates. | |
| 1091. |
Describe the function of RBC |
| Answer» \tHaemoglobin in RBC picks up oxygen in the lung tissues by forming a chemical compound with it.\tThis oxygen is carried to the tissues where it is used in the chemical reactions to produce energy.\tIt then combines with carbon dioxide which is produced in these reactions and returns to the lungs with the heart where the cycle starts again. | |
| 1092. |
Function of gol bladder in humans |
| Answer» It stores bile(a yellowish brown fluid) that is secreted by liver | |
| 1093. |
What is erythroblastosis feotalis? |
| Answer» Erythroblastosis fetalis\xa0is hemolytic anemia in the fetus (or neonate, as\xa0erythroblastosis\xa0neonatorum) caused by transplacental transmission of maternal antibodies to fetal red blood cells. The disorder usually results from incompatibility between maternal and fetal blood groups, often Rho(D) antigens.\xa0Erythroblastosis fetalis, also called hemolytic disease of the newborn, type of anemia in which the red blood cells (erythrocytes) of a fetus are destroyed in a maternal immune reaction resulting from a blood group incompatibility between the fetus and its mother. | |
| 1094. |
What is alternation of generation? Explain it by taking angiosperms as an example. |
| Answer» In angiosperm one phases come after another this is called alternation of generation | |
| 1095. |
Who are the amphibians of the plant kingdom? |
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Answer» Because it live in soil but it depends on water for sexual reproduction Bryophytes are called amphibian of plant kingdom because bryophyte are terrestrial but they required presence of water to complete their life cycle But why can u any give me answer Bryophytes Bryophytes |
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| 1096. |
Why kelvin cycle is known as c3 cycle |
| Answer» The carbon and oxygen required for this process are obtained from CO2, and the energy for carbon fixation is derived from the ATP and NADPH produced during the photosynthesis process. The conversion of CO2 to carbohydrate is\xa0called Calvin Cycle\xa0or\xa0C3 cycle\xa0and is named after Melvin\xa0Calvin\xa0who discovered it.\xa0It is\xa0called\xa0a\xa0cycle\xa0because, like the Krebs\xa0cycle\xa0in cellular respiration, the starting material is regenerated each time the process occurs. ... With each turn of the\xa0Calvin cycle, there are chemical inputs and outputs. | |
| 1097. |
Who is giving neet exam.in 2020 |
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Answer» I\'ll give. I will give ..... Adarsh Bhai yaa i will give ✅✅✅ |
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| 1098. |
Largest phylum? |
| Answer» Arthropoda | |
| 1099. |
What is imbibition ??? Thik se samajh nhi aa rha h!!!! |
| Answer» Imbibition is a special type of diffusion that takes place when water is adsorbed by solids-colloids causing an increase in volume. Examples include the absorption of water by seeds and dry wood. If there is no pressure due to imbibition, seedlings would not be able to emerge from soil.\xa0Imbibition\xa0is the process of water absorption through a solid substance, whereas,\xa0osmosis\xa0is the process of movement of water from higher concentration to lower concentration through a semi-permeable membrane. | |
| 1100. |
Impotant diagram ch1 to 8 |
| Answer» Mostly all the diagrams and content given in ncert is improtamt | |