Explore topic-wise InterviewSolutions in .

Correct answer is (C) 19/3

(A) Tyrosine

 (D) 50–100 ng/dl 

(C) 10–30 ng/dl

Correct answer is (B) 16

(B) 0.1–0.2 µg/dl

(D) 5–12 µg/dl

(A) Melatonin

(B) Connects the end of two DNA chains

Since, the possible factor of 8 in two factors are 1 × 8, 2 × 4, 4 × 2 and 8 × 1. 

Since, the numbers of elements in a matrix of order m x n is mn. 

Therefore, the possible orders of matrices having 8 elements are 1 × 8, 2 × 4, 4 × 2 and 8 × 1.

DNA is not completely autonomous in its duplication process because the replication does not occur without enzymatic activity. So it is not entirely correct to assert that DNA self-replicates.

During replication each chain of the DNA molecule acts by pairing new nucleotides and after the process two newly formed chains made with the union of these nucleotides appear. Then two DNA molecules are created, each with one chain from the original molecule and one new chain formed by new nucleotides. Thus it is not entirely correct to assert that the replication produces two new molecules of DNA. It is better to affirm that two new half-molecules are created.

For this phenomenon DNA replication is called semiconservative replication.

(C) 5.0–15.0 µg/100 ml

(A) Xanthine oxidase deficiency

We know that the total number of binary operation on set of cardinality n is \({n^n}^n\) . 

Since, the set {a, b} is having two elements. 

Therefore, the total number of binary operations on the set {a, b} is \({2^2}^2\) = 2⁴ = 16.

The process of copying, or duplication, of the DNA molecule is called replication. The enzyme that participates in the formation of a new DNA chain is the DNA polymerase. There are also other important enzymes in the replication process, the helicase, the gyrase and the ligase.

Repairing of wear and tear and Checking of hook and button before washing the clothes. 

During the DNA replication process, hydrogen bonds between nitrogen-containing bases of the polynucleotide chains are broken.

Answer is All of the above.

Laticiferous tissues : They are made up of thin walled, elongated, branched and multinucleate (coenocytic) structures that contain colourless, milky or yellow coloured juice called latex. These occur irregularly distributed in the mass of parenchymatous cells. Latex is contained inside the laticiferous tissue which is of two types :

(i) Latex cells : A laticiferous cell is a highly branched cell with long slender processes ramifying in all directions in the ground tissue of the organ. They do not fuse and do not form network. Plants having such tissues are called simple or non-articulated laticifers. e.g., Calotropis (Asclepiadaceae) Nerium, Vinca (Apocyanaceae), Euphorbia (Euphorbiaceae), Ficus (Moraceae).

(ii) Latex vessels : They are formed due to fusion of cells and form network like structure in all directions. At maturity, they form a highly ramifying system of channels full of latex inside the organ. Plants having such tissues are called compound or articulated laticifers. e.g., Argemone, Papaver (Papaveraceae), Sonchus (Compositae), Hevea, Manihot (Euphorbiaceae).

We have relation on defined by R = {(a, b): f(a) = f(b)}, where f ∶ X → Y be a function. 

Reflexivity : Let a ∈ X. Since, f(a) = f(a) ⇒ (a, a) ∈ R ∀ a ∈ X. 

Hence, relation R is a reflexive relation on set . 

Symmetricity : Let a, b ∈ X such that (a, b) ∈ R. 

⇒ f(a) = f(b)⇒ f(b) = f(a) ∀ a, b ∈ X. 

Hence, relation R is a symmetric relation on set X. 

Transitivity : Let a, b, c ∈ X such that (a,b) ∈ R and (b,c) ∈ R. 

⇒ f(a) = f(b) and f(b) = f(c) 

⇒ f(a) = f(c) 

⇒ (a, c) ∈ R. 

Hence, if (a, b) ∈ R and (b, c) ∈ R, then (a, c) ∈ R∀ a, b, c ∈ X 

Hence, relation R is a transitive relation on set X. 

Since, relation R is reflexive, symmetric and transitive relation on set X. 

Therefore, relation R is an equivalence relation.

Ironing does not come under washing of clothes. 

The length wise growth of organs is due to apical meristem.

Ideally, a DNA molecule should replicate in a perfect way. Sometimes however failures in the duplication occur, with alteration (deletion, addition or substitution) of one or more nucleotides in the molecule.

Those mistakes, or mutations, therefore make changes in the protein synthesis process too. For example, the production of an important protein for cells or tissues may be suppressed, new utile or inutile proteins can be created, etc. The mistake in the DNA duplication and the resulting production of altered genetic material are some of the main creative forces for the biological evolution and the diversity of species.

(B) Replication

Language does not come under physical development.

Integrated Pest Management (IPM) is an ecological approach to pest suppression.

The cell is equipped with an enzymatic system that tries to fix mistakes of the DNA replication process. This system, however, is not completely efficient.

DNA replication mistakes are kept in the original individual where the failure occurred when the phenomenon affects somatic cells. If a replication mistake occurs in the formation of a germline cell (e.g., in gametes) the DNA alteration may be transmitted to the offspring of the individual.

(B) Semi-conservative

Yes. DNA replication occurs in mitosis as well in meiosis.

Fat soluble Vitamins are A, D, E, K.

Food inspector, the People and Prevention of food Adulteration Act help in stopping adulteration.

Good hygiene helps to prevent being diseased. True

Stroke is a condition when part of the brain is deprived of carbon dioxide. False

The best source of calcium is Milk products. 

External source of recruitment bring new blood in the organisation.

The benefits / merits / advantages of using external sources of recruitment:-

• It encourages young blood with new ideas to enter the organisation.
• It offers wide scope for selection. This is because a large number of suitable candidates will come for the selection process.
• There are less chances of bias or partiality.
• Here there is no need to maintain confidential records.

The demerits / limitations of using external sources of recruitment:-

• It is very costly. 

This is because advertisements, test, medical examination etc., has to be conducted.

• It is very time consuming. 

This is because the selection process is very lengthy.

(A) DNA synthesis

Correct option (B) 2 

Salmonella food poisoning occurs because of contaminated meat, milk and milk products. TRUE

(C) RNA and DNA

Correct option (D) DNA

Hemolytic jaundice is also known as prehepatic jaundice. TRUE

(B) One strand is synthesized continuously and the other discontinuously