Despite occupying about 70% of the surface area of earth, the productivity
of the oceans is low because-

In eukaryotes, the regulation could be exerted at -
(A) Transcriptional level (formation of primary transcript)
(B) Processing level (regulation of splicing)
(C) Transport of mRNA from nucleus to the cytoplasm
(D) Translational level

Read the passage and answer the question given below.
When a host is exposed to antigens, which may be in the form of living or dead microbes or other proteins, antibodies are produced in the host body. This type of immunity is called active immunity. Active immunity is slow and takes time to give its full effective response. Injecting the microbes deliberately during immunisation or infectious organisms gaining access into body during natural infection induce active immunity. When antibodies are directly given to protect the body against foreign agents, it is called passive immunity.
Immunity provided to the foetus from the mother through placenta during pregnancy is :

Match List-l with List-II

List-l (Term)	List-II (Function)
(A) Nuclease	(I) Synthesizes DNA from RNA
(B) Ligase	(II) Have both directions exonuclease activity and synthesize new polynucleotide
(C) DNA Polymerase I	(III) Degrades nucleic acids by breaking phosphodiester bonds
(D) Reverse Transcriptase	IV) Joins DNA molecules together by formation of phosphodiester bonds

Choose the correct answer from the options given below:

Identify the statements which hold true for transgenic animals.
(A) Transgenic animals can be used to study vaccine safety.
(B) Over 95% of transgenic animals are mice
(C) Transgenic animals cannot be used to study human diseases
(D) Transgenic animal possess and express forgein gene

Which of the following statements are incorrect with respect to nucleotides ?
(A) Purines and pyrimidines are nitrogenous bases.
(B) Nucleotides and nucleosides are same.
(C) Phosphate group is linked to - OH of 5' C of a nucleoside through phosphoester linkage.
(D) In RNA, every nucleotide residue has an additional - OH group present at 3' position in the ribose.
(E) Thymine is an example of Pyrimidine.
Choose the correct answer from the options given below :

Arrange the given products formed during sewage treatment in correct sequence ?
(A) Biogas
(B) Activated sludge
(C) Flocs
(D) Primary sludge
Choose the correct options given below

Name the reaction by which Freons 12 are manufactured

A runs 5 times faster than B . If A gives B a start of 100 m , how far must the goal be so that A and B reach there at the same time.

Read the passage carefully and answer the Questions
In the formation of coordination complexes, if the inner \(d\) orbital \((n-1) d\) is used in hybridisation, the complex, is called an inner orbital or low spin or spin paired complex. And if it uses outer \(d\) orbital ( \(n d\) ) in hybridisation (like \(s p^3 d^2\) ), it is called outer orbital or high spin or spin free complex. The degeneracy of the \(d\) orbitals has been removed due to ligand electron-metal electron repulsions in the complex. This splitting of the degenerate levels due to the presence of ligands in a definite geometry is termed as crystal field splitting. For coordination complexes, the magnetic moment is determined by the number of unpaired electrons and is calculated by using the 'spin-only' formula, \(\mu=\sqrt{n(n+2)}\) where \(n\) is the number of unpaired electrons and \(\mu\) is the magnetic moment in units of Bohr magneton (BM). The coordination compounds are of great importance. These compounds are widely present in the mineral, plant and animal worlds and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems, industry and medicine.
The CFSE for tetrahedral \(\left[ CoCl _4\right]^{2-}\) is \(8000 cm^{-1}\), the CFSE for octahedral \(\left[ CoCl _6\right]^{4-}\) will be........

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Carbonyl compounds such as aldehydes, ketones, and carboxylic acids play an important role in the biochemical process of plants and animal kingdom.
Many aldehydes and ketones find applications in dye, perfumery and other industries.
The carbonyl carbon atom is \(s p^2\)-hybridized forming three sigma and one pi-bond with oxygen.
C-O bonds are polar bond due to high electronegativity of oxygen than carbon.
Hence the carbonyl carbon behaves as an electrophilic center and oxygen as a nucleophilic centre.
Primary and secondary alcohols yield aldehydes and ketones respectively upon oxidation with variety of oxidixing agents.
The boiling points of aldehydes and ketones differ from hydrocarbons and ethers.
Aldehydes and ketones undergo nucleophilic addition reaction due to presence of electrophilic carbonyl carbon.
Nucleophile and a proton add across the carbon oxygen double bond.
The starting compound (Y) in the following reaction is
\(Y \xrightarrow{\text { axidation }} \text { aldehyde } \xrightarrow{\text { oxidation }} \text { carboxylic acids }\)

Let \(\Delta=\left|\begin{array}{ccc}x & 2 & x \\ x^2 & x & 6 \\ x & x & 6\end{array}\right|=p x^4+q x^3+r x^2+s x+t\), then the value of \(5 p+4 q+3 r+2 s+t\) is equal to :

Let \(\vec{a}=2 \hat{i}+3 \hat{j}+2 \hat{k}\) and \(\vec{b}=2 \hat{i}+\hat{j}-2 \hat{k}\). Then a vector of magnitude 24 , which is perpendicular to the vectors \(\vec{a}+\vec{b}\) and \(\vec{a}-\vec{b}\), is: