Which one of the following diagnostic techniques is based on the principle of antigen-antibody interaction?

Which of the following are correct with reference to rDNA technology?
(A) Exo-nuclease removes nucleotides from the ends of DNA
(B) Replication starts at ori
(C) High velocity microparticle of gold, coated with DNA, are used to transfer DNA in a method known as gene gun
(D) Endo-nuclease makes cut at specific positions within DNA
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Read the passage carefully and give the answers to the question :
Does the number of species in a community really matter to the functioning of the ecosystem? This is a question for which ecologists have not been able to give a definitive answer. For many decades, ecologists believed that communities with more species, generally, tend to be more stable than those with less species. According to the International Union for Conservation of Nature and Natural Resources (IUCN) (2004), the total number of plant and animal species described so far is more than 1.5 million.
The following are the various hypotheses proposed in explaining the greatest biological diversity in tropics except :

Which of the following is/are NOT the way(s) to introduce alien DNA into the host cell?
(A) Using vectors like Agrobacterium tumifaciens
(B) Injecting directly into the nucleus of animal cell
(C) Using ethylene dibromide
(D) Using vectors like retroviruses
(E) Using biolistics or gene gun
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Arrange the given steps for regulation of gene expression in correct sequence?
(A) Regulation of splicing
(B) Transport of mRNA from the nucleus to the cytoplasm
(C) Translation
(D) Formation of primary transcript (Transcription)
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Which of the given example explains evolution by anthropogenic action?

Read the passage carefully and give the answers to the question :
Does the number of species in a community really matter to the functioning of the ecosystem? This is a question for which ecologists have not been able to give a definitive answer. For many decades, ecologists believed that communities with more species, generally, tend to be more stable than those with less species. According to the International Union for Conservation of Nature and Natural Resources (IUCN) (2004), the total number of plant and animal species described so far is more than 1.5 million.
Among the vertebrates, which of the following is the most species-rich group ?

Molarity (M) is defined as number of moles of solute dissolved in:

If A speaks truth in \(75\%\) cases and B speaks truth in \(80\%\) cases, then the probability that they contradict each other in a statement, is :

Which of the following hormones are secreted by placenta during pregnancy?
(A) Human Chorionic Gonadotropin
(B) Human Placental Lactogen
(C) Progestogens
(D) Cortisol
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A proton and \(\alpha\)-particle have same kinetic energy. The de-Broglie wavelength ratio \( \frac{\lambda_p}{\lambda_{\alpha}} \) is equal to:

Which of the following are correct about t-test statistics?
(A) The mean of t-test distribution is 0.
(B) It depends on the degrees of freedom.
(C) It depends on population standard deviation
(D) With more degrees of freedom, it closely resembles standard normal distribution.
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Which of the followings belong to false fruit category?
(A) Apple
(B) Cashew
(C) Strawberry
(D) Orange
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