Which of the following produces multiple identical copies of a gene for basic research or for large-scale production of a gene product?

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#Question id: 12444

#Unit 10. Ecological Principles

The component(s) of species diversity is/are

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#Question id: 3879

#Unit 3. Fundamental Processes

Which of the following is not usually essential for the catalytic activity of ribozymes?

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#Question id: 7217

#Unit 5. Developmental Biology

Following statements regarding to the metamorphic changes of frog development.

A. The metamorphic changes are brought about by the secretion of the hormone thyroxine (T4) into the blood by the thyroid gland

B. the conversion of T4 into the more active hormone tri-iodothyronine (T3) by the target tissues

C. the degradation of T3 in the target tissues

D. by the deiodinases enzymes T3 converted into T4 in target tissues.

Which of the following options are correct?

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#Question id: 5541

#Unit 5. Developmental Biology

What is the valued average rate at which the human brain produces neurons during development?

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#Question id: 249

#Unit 1. Molecules and their Interaction Relevant to Biology

According to Chargaffʹs observations of nucleotide composition of DNA samples, which of the following options are correct

A) % of (G + C) + % of (A + T) = 100%.

B) A = T.

C) G = C.

D) %A + %C + %T = 100%.