Which of the following was used to construct first recombinant DNA?

'r' in exponential growth equation implies:

Down's syndrome is a genetic disorder. It is due to:

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`.
The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency.
This disorder is caused due to the deletion of the gene for -

Match List-I with List-II

List-I (Hormones)	List-II (Role/functions)
(A) LH	(I) Causes stronger uterine contractions
(B) FSH	(II) Essential for maintenance of the endometrium during menstrual cycle
(C) Oxytocin	(III) Acts on Leydig cells and stimulates synthesis and secretion of androgens
(D) Progester one	(IV) Acts on Sertoli cells and stimulates secretion of some factors which help in the process of spermiogenesis

Choose the correct answer from the options given below:

The correct sequence of the formation of pollen grains is -
(A) Sporogenous tissue
(B) Formation of microspore
(C) Microspore tetrad formed by meiotic divisions
(D) Pollen grains develop from microspores
Choose the correct answer from the options given below

Observe the given figures and answer the question

Miller's experiment resulted in the acceptance that the formation of life was
preceded by:

The angle between the lines \(\vec{r}=3 \hat{i}+2 \hat{j}-4 \hat{k}+\lambda(\hat{i}+2 \hat{j}+2 \hat{k})\) and \(\vec{r}=5 \hat{j}-2 \hat{k}+\mu(3 \hat{i}+2 \hat{j}+6 \hat{k})\) is:

Two parallel plate capacitors of capacitances \(2 \, \mu\text{F}\) and \(3 \, \mu\text{F}\) are joined in series and connected to a battery of V volts. The values of potential across the two capacitors \(V_1\) and \(V_2\) and energy stored in them \(U_1\) and \(U_2\) are related as :

Three bad eggs are mixed with 7 good ones
If two eggs are drawn one by one without replacement
then the probability distribution of the number X of bad eggs drawn is

Two particles carrying a charge of q = 2 nC each connected by an insulating string are placed r = 1 m apart on a smooth horizontal surface. The tension in the string is

In visible light, orange differs from violet as they have

The amount to which ₹ 5000 will accumulate at the effective rate of 4% for 4 years and 5% for 2 years is: