SRMJEE Mock Test - 3 (Medical) - JEE MCQ

The flux through the cylinder is

As ϕ_A = ϕ_C

Modulation index defines the modulated signal's ratio of maximum to minimum voltage:

Modulation index = V_m / V_c = 5 / 25 = 0.2

Carrier Frequency f_c = 1.2 × 10³ kHz = 1200 kHz

Lower side-band frequency, f₁ = 1200 - 20 = 1180 kHz

Upper side-band frequency, f₂ = 1200 + 20 = 1220 kHz

For the smooth portion BC,

u = 0, s = l, a = g sinϕ

v = ?

From v² − u² = 2as,

v² − 0 = 2g sinϕ × l

For the rough portion CO:

u = v = √(2g sinϕ ⋅ l)

v = 0, a = g (sinϕ − μ cosϕ)

s = l

From v² − u² = 2as,

0 − 2gl sinϕ = 2g (sinϕ − μ cosϕ) l

−sinϕ = sinϕ − μ cosϕ

μ cosϕ = 2 sinϕ

μ = 2 tanϕ

F = 0 when 0 ≤ r ≤ R₁
Because intensity is zero inside the cavity.

F increases when R₁ ≤ r ≤ R₂
As there will be more mass enclosed if the radius of the enclosure is increased.

F ∝ 1/r² when r > R₂
As all mass is enclosed, it will behave as a point mass.

Electron and Positron is a matter and anti matter pair. The mass of an electron and of a positron is 0.00055 amu.
When matter and anti-matter annihilate their total mass gets converted into energy. Therefore, the energy released will be,
E = 2 × (0.00055) × 931
⇒ E = 1.02 MeV

Δl = 1 - 0.99970 = 0.00030 cm
Δl = αl Δt
Δt = Δl / (αl) = 0.0003 / (1.1 × 10⁻⁵ × 0.9997) = 27.3°C.
So, the plate temperature must be raised to 30°C + 27.3°C = 57.3°C.

The most suitable reagent for the conversion of 2-phenylpropanamide into 1-phenylethylamine is Br₂, NaOH.

Arrhenius equation for rate constant, k is k = Ae^−E_a/RT where A is the pre-exponential factor.
Since, e^−E_a/RT ​ is dimensionless, dimension of A = k.
For first order reaction, dimension of k = times⁻¹ 
∴ Also same for A.
As for the other options,
For a first order reaction, the product formation rate is directly proportional to reactant concentration, half-life = 0.693/k
or 69.3% of (1/k), and concentration of reactant changes with time by the equation which shows exponential decreases, not linear.

The carbohydrates or sugar where free aldehyde or ketonic group is absent (utilized in glycosidic bond formation) can not reduce the above reagents are called non-reducing sugar i.e., Sucrose, glycogen, starch.

Substances which can be stretched to couse large strain are called elastomers. e.g. tissue of aorta, rubber etc.

Lexan is a polymer of diethyl carbonate and bisphenol-A.
Lexan is a trademarked term for polycarbonate sheeting, one of the most widely used plastics in the world.
Lexan is not glass, but a polycarbonate resin thermoplastic. It is strong, transparent, temperature-resistant and easily formed, so is commonly used in place of glass.

An embryo shows geometrical growth initially but later it passes into arithematic phase.

Absolute growth rate (AGR): Increase in total growth of two organs or organisms is measured and comparison of total growth per unit time is called absolute growth. Absolute growth rate is the total growth per unit time. Relative growth rate (RGR) : It is growth per unit time per unit initial growth.
RGR= Growth in given time period / Measurement at start of time period
AG for leaf A = 10cm² = 5cm² = 5cm²
RGR for leaf A = 5/5 ​× 100 = 100%
AG for leaf B = 55cm² − 50cm² = 5cm²
RGR for leaf B = 5/50 ​× 100 = 10%
Though the absolute growth is same for both the leaves (A and B), relative rate of growth is more in leaf A because of its initial small size.

The Lateral meristem e.g. vascular cambium and  cork cambium(in dicotyledons and gymnosperms) are the meristems that cause increase in girth of the organs in which they are active, This is known as secondary growth of the plant.

• Platelets, also called thrombocytes, are cell fragments produced from megakaryocytes.
• Platelets can release a variety of substances most of which are involved in the coagulation or clotting of blood.

The hepatic portal vein carries blood from the intestine to the liver before it is delivered to the systemic circulation.

Photosynthesis takes place in the green leaves of plants and other green parts of plants like stem etc. The most active photosynthetic tissue in higher plants is the mesophyll of leaves. Mesophyll cells have many chloroplasts, which contain the specialized light-absorbing green pigments, the chlorophylls. When chlorophyll absorbs light, it gets excited and emits electrons. These chlorophylls are found in photosynthetic units called Photosystem I and Photosystem II. Each unit has a specific reaction centre which contains pigment molecules. These molecules absorb light of different wavelengths and emit electrons. Due to the photon of light, electrons of chlorophyll get excited. These electrons are picked up by an electron acceptor which passes them to an electron transport system of cytochromes. The excitement of electrons of chlorophyll b photon of light is the first step of photosynthesis.

The energy of light captured by pigment molecules called chlorophylls, in chloroplasts is used to generate high- energy electrons with great reducing potential. These electrons are used to produce NADPH₂ as well as ATP in a series of reactions called the light reactions because they require light.

Agrochemical based agriculture is used to increase the food production. It includes use of agrochemicals such as fertilisers and pesticides.

RNA interference (RNAi) is present in all eukaryotic organisms as a method of cellular defense. This method involves silencing of a specific mRNA due to complementary dsRNA molecules that binds and prevents translation of the mRNA.

ELISA is abbreviation of Enzyme linked immunosorbent assay. It is used to detected the disease at early stage.

Double helix model of DNA was proposed by James Watson and Francis Crick in 1953 based on X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin.

UAA is a nonsense codon. It signals for polypeptide chain termination. Hence, only 24 amino acids chain will be formed as the process of translation will be terminated at 25th codon.

Organisms have evolved from simpler forms to complex form. Hence the order of the events are genes first, then heterotrophic prokaryotes, then autotrophic prokaryotes, then eukaryotes and then animals.

Topic in NCERT: Evolution of life forms - a theory

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AB || MN and AM is the transversal.
∠1 + (x + 65°) = 180° (Co-interior angles)
90° + x + 65° = 180°
Or x = 25°
Now, CD || MN and BM is the transversal.
y + 65° = 180° (Co-interior angles)
y = 115°
Now, AB || CD and BM is the transversal.
z = y (Corresponding angles)
z = 115°
Now, x + y + z = 25° + 115° + 115° = 255°

Given equations: 15p – 45q = 24 and 6p – 18q = 48/5
We will compare these equations with a₁x + b₁y + c₁ = 0 and a₂x + b₂y + c₂ = 0.
15/6 = =
5/2 = 5/2 = 5/2
This implies

So, the given pair of equations has infinite solutions.