The Evil Quartet' of biodiversity loss is -

Arrange the steps of biopsy and histopathology of tissue involved in detection of cancer.
(A) A thin section of tissue is stained
(B) Freezing of tissue in liquid nitrogen
(C) A piece of the suspected tissue cut into thin sections
(D) Examination under microscope
Choose the correct answer from the options given below:

The process through which spermatids are transformed into spermatozoa (sperms) is known as:

Match List - I with List - II.

LIST I (Disease)	LIST II (Causal organism)
A. Ascariasis	I. Salmonella typhi
B. Amoebiasis	II. Plasmodium vivax
C. Typhoid	III. Entamoeba histolytica
D. Malaria	IV. Ascaris

Choose the correct answer from the options given below:

Select the correctly matched pair about sickle cell anaemia:
Genotype: Phenotype
(A) HbA HbA: Diseased phenotype
(B) HbA Hbs: Diseased phenotype
(C) Hbs Hbs: Diseased phenotype
(D) Hbs HbA: Carrier of disease
Choose the correct answer from the options given below:

Which one of the followings is an indirect measure of the organic matter present in water?

Match List-I with List-II

List-I (Products)	List-II (Microorganisms)
(A) Wine or beer	(I) Penicillium notatum
(B) Swiss Cheese	(II) Aspergillus niger
(C) Antibiotic	(III) Propionibacterium sharmanii
(D) Citric Acid	(IV) Sachharomyces cerevisiae

Choose the correct answer from the options given below:

The random variable X has the following probability distribution

X	0	1	2	3
P(X)	a	a	b	b

such that E\(\left(x^2\right)\) = 2E(x), then the value of b is:

Read the passage carefully to answer the questions given below
Some strains of `Bacillus thuringiensis` produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). In `Bacillus thuringiensis` the toxin is coded by a gene `crylAc` named cry. There are a number of them, for example, the proteins encoded by the genes `crylAc` and `cryllAb` control the cotton bollworms, that of `crylAb` controls corn borer. Using conventional methods of diagnosis (serum and urine analysis, etc.) early detection is not possible. Recombinant DNA technology, Polymerase Chain Reaction (PCR) and Enzyme Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis. The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. This enzyme is crucial for the immune system to function. The disorder is caused due to the deletion of the gene for adenosine deaminase. `RNAi` takes place in all eukaryotic organisms as a method of cellular defense. This method involves silencing of a specific `mRNA` due to a complementary `dsRNA` molecule that binds to and prevents translation of the `mRNA`.
Which of the following technique is not used for early diagnosis of diseases?

Which one of the following is the cause of extinction of Stellar's Sea Cow and Passenger Pigeon?

Match List - I with List - II.

List - I	List - II
(A) Plasmid of Salmonella	(I) Join foreign DNA to plasmid
(B) Restriction enzymes	(II) Insertional inactivation
(C) Ligases	(III) Construction of \(1^{s t}\) recombinant DNA
(D) \(\beta\)-galactosidase	(IV) Molecular scissors

Choose the correct answer from the options given below:

Which one of the following is not true for a molecule that can act as a genetic material?

General solution of \(\frac{dy}{dx} + \frac{\sqrt{1-y^2}}{\sqrt{1-x^2}} = 0\) is: