The number of phenotypes and genotypes obtained in F2 generation after crossing RRYY and rryy in pea plants are:

Observe the diagram and answer the question

(Disclamer: Figures are not to scale)
Which is the correct statement with respect to ecological pyramids?

Read the following paragraph and answer the given questions.
Repeated amplification is achieved by the use of a thermostable DNA polymerase (isolated from a bacterium, Thermusaquaticus}), which remain active during the high temperature induced denaturation of double stranded DNA. The separated DNA fragments can be visualised only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation. The separated bands of DNA are cut out from the agarose gel and extracted from the gel piece. The convention for naming these enzymes is the first letter of the name comes from the genus and the second two letters come from the species of the prokaryotic cell from which they were isolated, e.g., EcoRI comes from Escherichiacoli} RY 13. In EcoRI, the letter 'R' is derived from the name of strain. Roman numbers following the names indicate the order in which the enzymes were isolated from that strain of bacteria. Stanley Cohen and Herbert Boyer accomplished this in 1972 by isolating the antibiotic resistance gene by cutting out a piece of DNA from a plasmid which was responsible for conferring antibiotic resistance. Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA, RNA, protein, polysaccharides etc. The RNA can be removed by treatment with ribonuclease whereas proteins can be removed by treatment with protease. Other molecules can be removed by appropriate treatments and purified DNA ultimately precipitates out after the addition of chilled ethanol.

In the isolation process of genetic material, the purified DNA can be precipitated out after the addition of:

Observe the figure and answer the question (Q46-50):

Number of nitrogenous bases common between RNA and DNA is:

Which of the following biofertilisers are free living in the soil?
(A) Anabaena
(B) Azospirillum
(C) Rhizobium
(D) Azotobacter
Choose the correct answer from the options given below:

Which of the following is not the salient feature of Human Genome Project (HGP)?

The probability of having a haemophilia carrier daughter by a haemophilia carrier mother and a normal father is :

Four diode connections are given below. Identify the diagram in which the diode is forward biased.
(A)

(B)

(C)

(D)

Choose the correct answer from the options given below:

Which one of the following(s) is/ are inverted pyramid in an ecosystem?
(A) Pyramid of energy
(B) Pyramid of biomass (land)
(C) Pyramid of biomass (sea)
(D) Pyramid of Number
Choose the correct answer:

Given that the lines: \(\frac{x-1}{2}=\frac{y+2}{3}=\frac{z}{5}\) and \(\frac{x+2}{1}=\frac{y-1}{2}=\frac{z-\alpha}{2}\) are coplanar. Then the value of \(\alpha\) is:

Read the passage carefully and answer the questions
The carbonyl group of aldehydes and ketones is highly polar. The positively charged carbon is readily attacked by electron-rich nucleophile and the negatively charged oxygen atom is attacked by an electro-deficient electrophile. Aldehydes and ketones undergo nucleophilic addition reactions in the presence of acid or a base. The mechanism involves attack of a nucleophile on the electron deficient carbonyl carbon to form a tetrahedral intermediate. A new bond is formed between the carbon and oxygen. Protonation of the anion furnished by the reaction medium yields a neutral addition product. The addition product is same whether the reaction is catalyzed by acid or a base. For example in the presence of base aldehydes and ketones react with hydrogen cyanide to form cyanohydrin.
During nucleophilic addition reaction the carbonyl carbon undergoes a change in hybridization from:

A carrier wave of peak voltage 24 V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 70% ?

If \(\theta\) is the angle between any two vectors \(\vec{a}\) and \(\vec{b}\), then \(|\vec{a} \cdot \vec{b}|=|\vec{a} \times \vec{b}|\) for \(\theta\) equal to __________.