Which of the following forms 'Fried-egg' like structures during lab-culture?
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Which of the following forms 'Fried-egg' like structures during lab-culture?
Mycoplasma (PPLO) lack a cell wall. On solid agar the centre of each colony grows down into the medium and appears dense, while the periphery spreads thinly on the surface, so the colony looks like a fried egg. Hence the answer is Mycoplasma.
Which of the following is India's first cloned Gir cow, born on March 16, 2023 at the National Dairy Research Institute (NDRI) Karnal (Haryana)?
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Study the following T.S. of Cucurbita stem.

Choose the option showing the correct sequence of labeled parts 1 to 5.
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Following is the list (COLUMN I) of characteristics related to some animals. Make the correct matches with the animals listed under COLUMN II.

Choose the correct option.
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Which of the following has the largest number of protected wetlands designated under the Ramsar Convention?
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Given below are two statements, one labeled as Assertion (A) and other labeled as Reason (R). Choose the correct option from the codes given below.
Assertion (A) - Complex food molecules, like proteins, carbohydrates and fats are broken down into simpler substances (e.g., amino acids, glucose and fatty acids) through hydrolysis.
Reason (R) - The process of breaking down a water molecule ($$\text{H}_2\text{O}$$) into its components, hydrogen ($$\text{H}_2$$) and oxygen ($$\text{O}_2$$), is known as electrolysis. Hydrolysis, on the other hand, occurs when water reacts with another compound and splits it apart, like in the digestion of food or the breakdown of ATP in cells.
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Which of the following are known to possess two types of nuclei, Macro- and Micronuclei?
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Cholesterol serves as the precursor for the synthesis of various steroid hormones. Which of the following is the source of $$\text{C}_{19}$$ Steroidal Hormone, Androsterone?
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Given here is the histological diagram of the mammalian stomach. Its mucosal membrane is profusely folded and the pit-like infoldings distally form numerous simple or branched tubular gastric glands occurring in the fundus and corpus part. The principal type of cells found in each gland are labeled 1 - 4.

Choose the correct option representing Pepsinogen, Hydrochloric Acid, Gastrin Hormone and Mucus-secreting cells, respectively (1 to 4).
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Translation is an important stage in the Central Dogma of Protein Synthesis. Which of the following is involved in the activation of Amino Acids?
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Some characters of human beings follow a 'criss-cross' pattern of inheritance. Which of the following exemplifies this?
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The periplastidial and perimitochondrial spaces are
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An alkane having 16 covalent bonds is the $$m^{th}$$ member of alkane homologous series. The ratio of carbon to hydrogen by weight in the $$m^{th}$$ member of alkyne homologous series is
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The IUPAC nomenclature of organic compound 'A' is But-2-enoic acid. The weight of carbon dioxide produced by complete combustion of 44 g of the organic compound 'A' would be
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A solid compound 'X' on heating gives $$\text{CO}_2$$ gas and a residue. The residue when mixed with water forms compound 'Y'. On passing an excess of $$\text{CO}_2$$ through 'Y' in water, a clear solution of 'Z' is obtained. On boiling 'Z', the compound 'X' is reformed. The pH of aqueous solution of compound 'X' at $$25^\circ\text{C}$$ is
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In an organic compound of molar mass greater than 100 containing only C, H and N, the percentage of C is 6 times the percentage of H while the sum of the percentages of C and H is 1.5 times the percentage of N. Knowing that the percentage is taken by mass, the least value of the molar mass of the organic compound is
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A hypothetical element 'Coronium' has two isotopes $$A_1$$ and $$A_2$$. The mass of $$3 \times 10^{22}$$ atoms of $$A_1$$ is 20 g while the mass of $$1.5 \times 10^{22}$$ atoms of $$A_2$$ is 10.5 g. Then average atomic weight of element 'Coronium' in isotopic mixture ($$3 \times 10^{22}$$ atoms of $$A_1$$ and $$1.5 \times 10^{22}$$ atoms of $$A_2$$) would be approximately
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For an experiment in the laboratory only two solutions are available.
Solution A - 250 g of 40% (w/w) NaCl solution and
Solution B - 300 g of 60% (w/w) NaCl solution
The Maximum weight of a solution (having exactly 55% (w/w) NaCl concentration) that can be prepared by the mixing of Solution A and Solution B only can be
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The nucleus of the element X with mass number 81 contains 31% more neutrons as compared to protons. Then the relationship between the nuclei of element X with nuclei of element $$^{79}\text{As}$$ is that they are
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If the atomic weight of the most stable isotope of the element M is 40 times that of the lightest element, then formula of the compound of its phosphate is
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An oxide of nitrogen has molecular weight 30. The total number of electrons, in a sample containing three molecules of the oxide would be (assuming that nitrogen and oxygen are present in their most stable isotopic state)
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Elements P, Q, R and S belong to the same group in periodic table. The oxide of P is acidic, oxide of Q and R are amphoteric while the oxide of S is basic. The most electropositive element among them is
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An element X, which is a yellow solid at room temperature, shows catenation and allotropy. The element X forms mainly two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants. Most likely the element X is
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Ram treated a lustrous divalent element M with potassium hydroxide. He observed the formation of bubbles in the reaction mixture. He made the same observations when this element was treated with sulphuric acid. Then element M would be
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The unit digit of $$3^{27}$$ is
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The given function $$f(x) = 2x^4 - 6x^3 + 3x^2 + 3x - 2$$ is not divisible by $$g(x)$$, where the function $$g(x)$$ is
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Mr. Venkat takes a trip from Chennai to Bengaluru and back. While going his speed is $$40\ \text{km/hr}$$ half the way and $$60\ \text{km/hr}$$ for the remaining half of the distance. When he returns he drives at $$40\ \text{km/hr}$$ for half the time and at $$60\ \text{km/hr}$$ for the remaining half time of travel back. His average speed in the entire trip is
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The factorization over Z of $$(a + b + c)^3 - (a^3 + b^3 + c^3)$$ is
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The area of the square having end points of one of its diagonals as $$(1, 3)$$ and $$(5, 1)$$ in appropriate units, is
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How many total terms, 'the square terms' and 'the product terms' will the expansion of $$(x_1 + x_2 + \cdots + x_{20})^2$$ contain?
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Given that $$\alpha$$ and $$\beta$$ are the roots of the quadratic equation $$x^2 - 2bx + c = 0$$. The value of $$\alpha^4\beta^4 + \alpha^4\beta^3 + \alpha^3\beta^4$$ is equal to
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The lengths of six non-collinear line-segments are 3, 4, 5, 6, 7 and 8 units. The maximum number of scalene triangles that can be formed by using these line segments is
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Given that P is a point on the circum-circle (on arc AC) of an equilateral triangle ABC other than its vertices such that $$2PA = PC$$, then $$PA \colon PB$$ is
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There are 2025 cards numbered from 01 to 2025 (i.e. 1, 2, 3, ..., 2025). One card is drawn at random, then the probability that the number on the selected card leaves remainder of 25 when it divides 2025, is
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ABCD is a parallelogram. The point E lies on diagonal AC such that EC is one-fifth of AE. Given that DE and AB meet at F, when produced further. The ratio $$CD \colon FB$$ equals
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If the two quadratic equations $$ax^2 + 2bx + c = 0$$ and $$ax^2 + 8bx + 7c = 0$$, have a common root, then a, b and c are in
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A point particle of mass m moving with velocity u in a straight line is subjected to a constant acceleration at an instant $$t = 0$$. Sometime later, at time $$t = n$$, its velocity is found to be n time the initial velocity. The distance covered by the particle during the time interval $$t = 0$$ to $$t = n$$ is expressed as
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The following figure represents the acceleration verses time graph of a particle which starts its journey from the rest position at time $$t = 0$$. The velocity of the particle at $$t = 5\ \text{s}$$ is

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The heart of an animal pumps 40 cc of blood per second under the pressure $$15000\ \text{N/m}^2$$. The power of the heart of the animal is
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A small metallic spherical ball is dropped from height h on the wet clay on the Earth surface. It travels distance S inside the wet clay before it stops. The uniform resistive force offered by the clay to the ball, as it penetrates a vertical distance S through the clay, is (the size of the ball is ignored as compared to S)
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A bullet of mass 10 g is moving with a speed u when it enters a bunch of a certain identical fixed wooden blocks kept in sequence in line. The velocity of the bullet drops to zero as it just leaves the third plank. How many such planks will the same bullet can penetrate when the initial speed of the bullet is doubled (assume all the planks to be fixed on the floor and the bullet travels horizontally)
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An engine is going away from a hill with a constant speed. When it is at a distance of 900 m, it blows a whistle. The echo of the same is heard by the driver after 6 sec. If speed of sound in air is $$330\ \text{m/s}$$, the speed of engine is
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In the given network of resistances, the equivalent resistance across terminals A and B is estimated to be

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The mass of the Moon is $$\frac{1}{81}$$ times the mass of Earth while the radius of the Moon is $$\frac{1}{3.7}$$ times the radius (R) of the Earth. At what height h above the surface of Earth, an object will have the same weight as it weighs on the surface of the Moon?
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A torch bulb rated as 6 W, 1.5 V is connected in a circuit as shown in the figure. The <i>e.m.f.</i> of the cell needed to make the bulb glow normally is

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The given network of resistances is a part of an electric circuit containing the sources of EMF providing current. The potential difference across $$6\ \Omega$$ resistance is measured to be 12 volt as shown in the figure. The value of potential difference across the terminal A and B is

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A solid cylinder, made up of a material of resistivity $$\rho$$, has length $$\ell$$ and radius $$r\sqrt{3}$$. Three coaxial cylinders A, B and C of equal length $$\ell$$ have been cut from this thick cylinder. The cylinder A is a solid cylinder of radius r. B is a hollow cylinder with inner radius r and uniform wall thickness $$(\sqrt{2} - 1)r$$ while the hollow cylinder C has inner radius $$r\sqrt{2}$$ and outer radius $$r\sqrt{3}$$. The relationship between their end-to-end resistance is
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Two plane mirrors are inclined at an angle of $$60^\circ$$ with each other. A ray of light is incident on one of the mirrors at an arbitrary angle of incidence $$\angle i$$. The ray is reflected from this mirror and falls on the second mirror where it further gets reflected parallel to the first mirror. The angle of incidence $$\angle i$$ is
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In samara fruits, wings for dispersal are modified outgrowths of the pericarp. Which of the following winged fruits is/are not samara?
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Study the following statements and choose the correct option(s).
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In the following set-up the leaf was destarched by keeping it in dark overnight. The bottle contains a solution of Pyrogallol. After exposing the set-up to sun light for a few hours, the entire leaf was tested for the presence of starch by iodine test.

Choose the option(s) showing correct observation(s).
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Which of the following statement(s) is/are correct regarding the different atom models?
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What happens when an iron nail is dipped into a copper sulphate solution?
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Two solutions are available as sample.
Solution A - 2 L of 0.1 M $$\text{H}_2\text{SO}_4$$ solution, and
Solution B - 1 L of 0.2 M NaOH solution
Then the correct statement(s) is/are
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ABCD is a rhombus with diagonals $$AC = 10\ \text{cm}$$ and $$BD = 10\sqrt{3}\ \text{cm}$$ intersecting at point E. A circle is drawn passing through three points A, E and B with its center at O. Straight-line EF is drawn parallel to AB such that the point F lies on the side BC. Also there lies a point P somewhere inside the rhombus then,
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ABCD is a rectangle of length $$\ell$$ and breadth b. The breadth is two-seventh $$\left(\frac{2}{7}\right)$$ of its length $$\ell$$. P is the mid-point of side AB. As shown in the figure, APQ & BPR are the two quadrants while CXD is a semicircle with X as the mid-point of the arc CXD, then

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Given that k is the number of distinct ordered pair $$(x, y)$$ of real numbers satisfying equations $$x + y = xy$$ and $$x - y = 3xy$$ then k is one of the roots of the quadratic equation(s)
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A ball of mass $$m = 100\ \text{g}$$ is thrown vertically up with an initial velocity $$u = 98\ \text{m s}^{-1}$$. The ball goes up in the space and falls back to the ground. During its motion, the ball is observed to be at a certain height h at time $$t_1$$ and at time $$t_2$$. Also the speed of the ball is equal after time $$t_3$$ and $$t_4$$ from the start of its journey. With the given observation one can conclude that
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A 3 cm long object pin is kept vertical on the horizontal principal axis of a convex mirror in front of it. The distance of the object pin (standing above the principal axis) is 30 cm from the pole of the convex mirror. A plane mirror facing the pin is placed perpendicular to the principal axis at a distance of 10 cm from and in front of the same convex mirror covering just the lower half of it. The images of the object pin, formed by the two mirrors, are found to coincide. Then
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Two long straight copper wires, carrying parallel currents of $$i_1 = 2\ \text{A}$$ and $$i_2 = 5\ \text{A}$$ respectively, lie 10 cm apart in the plane of paper as shown. Knowing that the steady current through a wire produces magnetic field, one can argue that

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