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Proteins are synthesized on Ribosomes.

Correct option (C) Glucose present as monomers within the cell exerts more osmotic pressure than a single glycogen molecule, resulting in excess water within the cells. 

Explanation:

Glucose is a monosaccharide and osmotically active molecule which increase osmotic pressure in cell so water enters in cell while glycogen is osmotically inert molecule does not change the osmotic pressure.

Answer is : (c) Glucose present as monomers within the cell exerts more osmotic pressure than a single glycogen molecule, resulting in excess water within the cells

Glucose is a monosaccharide and an osmotically active molecule which increases osmotic pressure in cell. So, water enters in cell while glycogen is osmotically inert molecule does not change the osmotic pressure. This is the reason why glucose is not stored in the cell instead glycogen is stored in the animal body.

Answer is : (d) Al₂O₃ > CaO > MgBr₂ > NaCl

Lattice energy is defined as the amount of energy required to completely seperate one mole of a solid ionic compound into gaseous constituent ions.

It is directly proportional to the charge of the ions. Thus, greater the ionic charge, larger is the lattice energy.

Hence, correct order is Al₂O₃ > CaO > MgBr₂ > NaCl

Correct option  (A)  624 

Explanation:

No. of unique nucleotide = 5

No. of bases in codon = 4

so, total combinations ⇒ 54 ⇒ 625

No. of stop codons = 1

so, unique amino acids (maximum) = 625 – 1

⇒ 624 

Answer is : (c) Honeybee and ant

All haploid sexually reproducing organisms would produce sperms/male gametes without the process of meiosis, e.g. Honeybee (Apis) and Ant (Formica). Haploid parents produce gametes by mitotic division. This happens because meiosis is reductional division in which the daughter cells contain half the number of chromosomes as the parent cell. Therefore, haploid organisms do not show meiosis to further disturb their ploidy.

Answer is : (a) ClF₃

The bond angle depends upon the electronegativity of the central atom. More is the electronegativity of the central, larger is the bond angle. Thus, among the given central atom Cl has the highest electronegativity. Therefore, ClF₃ has the largest bond angle at the central atom.

Correct option(b)

Explanation:

as V_y=U_y-gt

Correct option(a)

Explanation:

CM will go downwards

(No option is matching)

When we squeeze the snow due to increased pressure, melting point of ice (snow) is lowered and it melts. As pressure is removed, water formed is again frozen because melting point is again raised. This process is called regelation of ice.

None of the option given is correct.

Answer is : (c) lipids, proteins and carbohydrates

Removal of pancreas impairs the breakdown of lipids, proteins and carbohydrates because pancreas produces insulin and other important enzyme like trypsin, chymotrypsin, amylase and lipase which helps in breakdown of macromolecules.

Answer is : (a) Codominance

Blood group AB represents codominance. In codominance a heterozygous individual expresses both alleles simultaneously with blending. No single allele is dominant over the other. Expression of both A and B alleles at same time results in AB type blood.

Answer is : (a) 1590

Given, A = {1, 2, 3, …, 30}

Case I All three number are multiple of 3 then product of three number are divisible by 9.

∴ ¹⁰C₃ = 120

Case II Two number are multiple of 3 and other are not multiple of 9.

i.e. ¹⁰C₂ x ²⁰C₁ = 900

Case III One are multiple of 9 and other two are not multiple of 3.

³C₁ x ²⁰C₂ = 570

∴Total number of ways = 120+900+570 = 1590

Answer is : (b) S is the empty set

x and y are positive integer

x² - y² = 12345678

RHS 12345678 is and even number and last digit is 8.

∴ The last digit of x be 3, 7

and the last digit of y be 1, 9

 ∴x and y must be odd and square of difference is multiple of 8 but RHS is not multiple of 8.

∴ S is the empty set.

Answer is : (c) (5, 12, 13)

We have,

Four triangle having sides are

(5, 12, 9), (5, 12, 11), (5, 12, 13), (5, 12, 15)

A right triangle has maximum area.

∴ Among these the triangle whose sides (5, 12, 13) form a right angled triangle.

∴ It has maximum area.

In warmer, weather, curds from milk forms faster because the rate of bacterial multiplication increases.

Answer is : (b) taller than those grown in light

Seedlings grown in dark are taller than those grown in light as they develop long hypocotyls (embryonic shoot) and their cotyledons remain closed around the epicotyl in an apical hook. This process is referred to as etiolation.

Rotation of crops is carried out to increase in nitrogen content of the soil.

‘On the origin of species , by means of Natural selection’ was written by Charles Darwin.

Answer is : (c) narrowing arteries by fat deposition

Saturated dietary fats increase the risk of heart disease by narrowing arteries by fat deposition. Saturated fat raises the level of cholesterol in your blood. High levels of Low Density Lipid (LDL) cholesterol in blood are responsible for their deposition in blood vessel, thus narrowing the lumens and increasing the risk of heart diseases and stroke.

Answer is : (a) cellulose

Dietary fibres are composed of non-starch polysaccharides such as cellulose, dextrins, inulin, lignin, chitins, pectins, beta-glucans, waxes and oligosaccharides. Dietary fibres, also known as roughage is the portion of plant derived food that cannot be completely broken down by digestive enzymes. Rest others, i.e. amylase, proteins and unsaturated fats are although basic components of diet but are not considered as dietary fibres.

Saturated dietary fats increase the risk of heart disease by narrowing arteries by fat deposition.

Dietary fibers are composed of Cellulose.

Answer is : (b) 45

The people with Turner’s syndrome have 44 + XO chromosomes, so there are a total of 45 chromosomes only in each cell. Such persons are sterile females who have rudimentary ovaries, undeveloped breasts, small uterus, short stature and abnormal intelligence.

Answer is : (c) a pressure dependent physical process

The filtration of blood at the glomerulus is a pressure dependent physical process known as renal ultrafiltration. The force of hydrostatic pressure in the glomerulus (the force of pressure exerted from the pressure of the blood vessel itself) is the driving force that pushes filtrate out of the capillaries and into the slits in the nephron.

Answer is : (b) excess of thyroid hormones

Grave’s disease is an immune system disorder that results in the overproduction of thyroid hormones (hyperthyroidism). Its symptoms include anxiety, irritability, tremor, heat sensitivity, enlargement of thyroid gland, change in menstrual cycle, etc.

Answer is : (b) no known mechanism of sexual reproduction

The ‘imperfect fungi’ belongs to class Deuteromycetes. They are called as imperfect because sexual reproduction is absent in these forms. They reproduce only by asexual spores called conidia.

Answer is : (b) Amniotic egg

Presence of amniotic egg is not a characteristic of phylum Chordata. The four features shared by all chordates are presence of a single notochord, a dorsal hollow nerve cord, pharyngeal slits and a post-anal tail. Amniotic eggs are present in reptiles, birds and mammals only.

Answer is : (c) 1 GTP, 3 NADH and 1 FADH₂

TCA cycle or Citric acid cycle is a series of reactions that produces one GTP or ATP as well as three NADH molecules and one FADH₂ molecule in each turn, which will be used in further steps of cellular respiration to produce ATP for the cell.

Answer is : (c) Complementary bases

Hydrogen bonding in DNA occurs between complementary bases in order to keep the two strands of DNA helix together. These bonds occur as 2 hydrogen bonds between adenine and thymine and 3 hydrogen bonds between cytosine and guanine.

Correct option: (C) Sublimation

Explanation: 

NH₄Cl undergoes sublimation while NaCl does not.

Correct option: (D) Si

Explanation: 

Silicon is tetravalent, so it forms SiCl₄.

Correct option  (A) Cu

Explanation:

Cu is present below H₂ in electrochemical series so it can not produce H₂ gas in reaction with HCl

Correct option (D) Cr

Explanation:

K₂CrO₄  ⇒ Cr⁺⁶ (highest oxidation state)

NbCl₅  ⇒ Nb⁺⁵

MnO₂ ⇒ Mn⁺⁴

Correct option(b)

Explanation:

ax² + (a + b)x + b = 0

(x + 1) (ax + b) = 0

 roots are -1, -b/a

Answer is : (d) \(^1_0n\)

Following conservation of mass number and atomic number, we have

\(^9_4Be\) + \(^4_2He\) → \(^{12}_6C\) + \(^1_0n\)

So, particle \(^1_0n\) is a neutron.

Answer is : (b) I and II

In photosynthesis, photophosphorylation and in aerobic respiration, oxidative phosphorylation occurs that requires proton gradient. The sunlight-driven production of ATP from ADP and inorganic phosphate is called photophosphorylation. It occurs in the chloroplast. Oxidative phosphorylation is the process in which ATP is formed by the transfer of electrons from NADH or FADH₂ to O₂ by a series of electron carriers. It occurs inside the mitochondria.

Correct option is (c) Statements I and IV are correct

In case A, voltage across bulb is higher, so lamb will burn brighter. In case B, voltage is same as either of battery but each battery supplies only half of current, hence the batteries will lasts twice as long.

Answer is : (d)

Velocity increases with time and then reaches terminal velocity. Velocity remains constant after reaching terminal speed.

Answer is : (b) anti-clockwise only

India is in northern hemisphere and due to rotation of earth, radially rushing wind will tend to rotate in anti-clockwise sense.

Answer is : (c) Statements I, III and IV are correct

Electrons are not effective in scattering α-particles because they are about 7000 times lighter than α-particles.

Correct option: (B) a copper vessel

Explanation:

Copper cannot displace lead from its solution as it is less reactive than lead.

(C) The solubility of KCI decreases with temperature.

Answer is : (a) 100 g

From the graph it can be seen that solubility of KNO₃ in water at 40°C is approximately 200 g per 100 of water.

∴ Amount of KNO₃ that dissolve (or solubility) in 50 g of water will = 200/100 x 50 = 100 g

Answer is : (b) transport oxygen to different parts of the body

The role of haemoglobin is to transport oxygen from lungs or gills to different parts of the body. There it releases the oxygen to permit aerobic respirisation to provide energy to power the functions of the organism in the process called metabolism.

Correct option (A)

Explanation:

Time period will increase as the amplitude is increases.

Correct option  (C)

Explanation:

due to soap bubble surface tension is reduced therefore in that area. Black paper powder will sink. 

Answer is : (c) mgh

As block is sliding with a constant speed, so change in kinetic energy of block when it reaches bottom is zero.

Now, by work-energy theorem,

Total work done = Change in kinetic energy

⇒ W_friction + W_gravitation = ∆KE

⇒ W_friction = - W_gravitation

or W_friction = - mgh

= So, energy dissipated due to friction = mgh.

Answer is : (c) 0.0 V

As primary voltage is constant, there is no change of magnetic flux of secondary coil.

So, there is no induction and hence voltage across secondary is zero.

Correct option is (b) Parapodia

Parapodia are present in aquatic animals, i.e. annelids like Nereis which help them in swimming. Other three features, i.e. metameric segmentation, jointed appendages and chitinous exoskeleton are present in phylum Arthropoda. Out of these, metameric segmentation is visible as tagmetisation.