SRMJEE Mock Test - 6 (Medical) - JEE MCQ

Monarch butterflies (a) have cryptic coloration to avoid being preyed upon, making them (iii) prey with cryptic coloration.
Cactus-feeding moths (b) are predators of the prickly pear cactus, making them (i) predator.
Starfish Pisaster (c) is a predator that regulates prey populations, so it's (iv) a predator.
Herbivorous insects (d) are prey species in an ecosystem, making them (ii) prey.

After the formation of the product in bioreactors, it undergoes through some processes before a finished product is ready for marketing. The processes include separation and purification of products which is collectively called as downstream processing.

The sequence of the 5’ and 3’ primers for the given DNA sequence will be 5’ AATGC 3’, 5’ GACTC 3’. In primer design, the forward primer is derived directly from the start of the DNA sequence, which is 5’ AATGC 3’. The reverse primer is complementary to the end of the sequence, considering the antiparallel nature of DNA, resulting in 5’ GACTC 3’. This follows the standard method for designing primers, as discussed in PCR techniques and DNA replication processes.

• Human chorionic gonadotropin (hCG) is a hormone that supports the normal development of an egg in a woman's ovary, and stimulates the release of the egg during ovulation.
• Human chorionic gonadotropin interacts with the LHCG receptor (luteinizing hormone/choriogonadotropin) of blastocyst and promotes the maintenance of the corpus luteum during the beginning of pregnancy. Corpus luteum secretes the hormone progesterone during the first trimester.
• Presence of the hCG in urine is the indication of pregnancy. Its level increases every 48-72 hrs in pregnant women.

Y = FL/Al
or
or F ∝ A or F ∝ r² or F ∝ d²
∴
Given, d₁ = d, d₂ = 2d, F₁ = 200 N
∴
or F₂ = 4 × 200 = 800 N

Y = FL/Al
or
or F ∝ A or F ∝ r² or F ∝ d²
∴
Given, d₁ = d, d₂ = 2d, F₁ = 200 N
∴
or F₂ = 4 × 200 = 800 N

Magnification of objective lens m = I/O = v₀/u₀ = f₀/u₀

• High input resistance
• Low output resistance
• More efficiency
• More current amplification
• More voltage amplification

Since the charges are placed along the same straight line, the electric field at x = 0 will be directed along the x-axis and its magnitude is given by:



^{which is choice (1).}

K.E. of emitted electrons = radiation of energy - work function
= 6.2 eV - 4.2 eV = 2 eV = 2 x 1.6 x 10^-19 J = 3 x 10^-19 J (approx.)

Using conservation of energy
Increase in kinetic energy = Decrease in potential energy K - 0 = q(-dV) ⇒ K = qEy, where q(-dV) is decrease in potential energy. As displacement and electric field are along the same direction, dV = -Ey.

-NO₂ is ambidentate ligand and can form a coordinate bond with the central metal atom through the negatively charged O atom (Nitrito) or the lone pair on the N atom.

Hence, the complex [Co(NH₃)₅(NO₂)]Cl₂ can exist as Nitropentaaminecobalt (III) chloride or as Nitritopentaaminecobalt (III) chloride.

Primary amines react with CS₂ and HgCI₂ to form alkyl isothiocyanate and the reaction is called Hoffmann mustard oil reaction.

Carbylamine reaction: The reaction is used to test p-amines.

Perkin reaction: It is a reaction for making an unsaturated aromatic acid (as cinnamic acid) by heating an aromatic aldehyde with an acid anhydride (as acetic anhydride) in the presence of a base (as sodium acetate or potassium carbonate).

Hoffmann-bromamide reaction: It is used for the conversion of amides to p-amines with one carbon atom less than parent amide.

Ptyalin is present in human saliva. The optimum pH for Ptyalin activity is 5.6 − 6.9. But normally stomach pH is 1.5 − 3.5. So activity of Ptyalin decreases in stomach.

In alkali metals, the reactivity increases down the group due to decrease in IE₁ . But in case of halogens, the reactivity decrease down the group due to decrease in their electrode potentials.

FCC unit cell is an example of the closest packed structures.

Side view of the arrangement of atoms,

Unit cell view of the arrangement of the same atoms,

Here, the first and fourth layers are identical.

It is clear from the above figure that the closest packed layers, which are hexagonally packed 2-D arrangement of spheres are arranged perpendicular to the body diagonal of the FCC unit cell.

Ciliated epithelium.Explanation:The inner surface of bronchioles and Fallopian tubes possess ciliated epithelium. In the respiratory tract cilia help to push mucus towards the pharynx. In Fallopian tube the cilia help to move an egg towards the uterus.

Ascomycetes, commonly known as sac-fungi, are distinguished by their mode of sexual reproduction, where they produce ascospores endogenously within sac-like structures called asci. These asci are often organized into larger fruiting bodies known as ascocarps. This makes Option C the correct answer. Option A is incorrect as zoospores are characteristic of some other fungi groups like Phycomycetes. Option B is also incorrect for Ascomycetes, whose mycelium is typically septate and not coenocytic. Option D is incorrect as it describes Deuteromycetes, not Ascomycetes.

Darwin's Theory of Evolution (1) is associated with natural selection, which is the process of gradual change in species through survival of the fittest (C).
Lamarck's Theory of Evolution (2) is the idea that acquired characteristics (such as a giraffe's neck elongating) are passed down to offspring (A).
Fitness in Evolution (3) refers to an organism's ability to survive and reproduce based on inherited traits (D).
Natural Selection (4) refers to the process where variations that provide better adaptation to the environment are selected over time (B).

In animal cells, during the S phase of interphase, DNA replication begins in the nucleus and the centriole duplicates in the cytoplasm. These duplicated centrioles move towards opposite poles of the cell in prophase of mitosis.

• Physiological barriers to the entry of microorganisms into the human body are tears in the eyes, saliva in the mouth and HCl in the stomach.
• The enzymes lysozymes are found in tears and saliva and inhibit the synthesis of peptidoglycan present in the cell wall of microorganisms especially eubacteria.
• Disease-causing microorganism enters through different routes into the body. The physiological barrier prevents their entry. Tears act as a physiological barrier for entry of pathogen.

Topic in NCERT: Innate immunity

Line in NCERT: "skin on our body is the main barrier which prevents entry of the micro-organisms."

Large amount of fossilized pollen grain are found during excavation process of older parts due to tough covering of Sporopollenin that make the outer wall of pollen grain, exine. This substance cannot be hydrolyzed by any enzyme known.

DPT vaccine is for diphtheria, pertussis and tetanus. The patient suffering from typhoid is required to be treated with antibiotics as it is a bacterial disease.

It is given that,

Ganesh's position from left = 12

Rajan's position from right = 15

After interchange,

Rajan's position from right = 20

Total boys in the class = Ganesh's position from left + Rajan's position from right -1
Boys = 12 + 20 - 1 = 32 - 1 = 31.

Thus, there are 31 boys in the class.

Hence, option D is the correct answer.

Let the cost price of an article be ₹x.

Selling price of the article at a gain of 12.5% is:
SP = Cost Price + Gain % of Cost Price
⇒ x + 12.5% of x
⇒ x + (1/8) × x
⇒ ₹(9/8) x

Selling price of the article at a gain of 25% is:
SP = Cost Price + Gain % of Cost Price
⇒ x + 25% of x
⇒ x + (1/4) × x
⇒ ₹(5/4) x

According to the question, the difference between the selling prices at 25% and 12.5% gain is ₹22.50:
(5/4)x - (9/8)x = ₹22.50

Converting to a common denominator:
(10x/8) - (9x/8) = ₹22.50
(x/8) = ₹22.50
x = ₹22.50 × 8
x = ₹180

Thus, the cost price of the article is ₹180.

Given radius r₁ = 3, r₂ = 5
Sum of the radii = r₁ + r₂ = 8
As, the sum of the radii = distance between the centres
Therefore, two circles will touch each other as shown in figure-

The maximum number of tangents that can be drawn are 3.

"To smell a rat" means to suspect that something is wrong or to sense that someone has caused something wrong.
So, 'to suspect a trick or deceit' fits well as the meaning of the given idiom/phrase.
Thus, option A is the correct answer.