DNA is made of two chains that twist about one another in the shape of a _______.
Broken ladder
Straight ladder
Straight spiral
Double helix
Additional Questions
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Which of the followings are cancer-causing genes? |
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During protein synthesis, AUG functions as the initiator codon in mRNA. What should be the anticodon on the tRNA molecule that picks up and brings the amino acid specified by this codon? |
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What are those structures that appear as beads-on-string in the chromosomes when viewed under electron microscope? |
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The sections of a structural gene that are expressed are the ______. |
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Which one of the following techniques made it possible to genetically engineer living organisms? |
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The genetic material of Rabies virus is |
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The sequence of structural gene in lac operon concept is |
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Production of a human protein in bacteria by genetic engineering is possible because |
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Select the two correct statements out of the four (a–d) given below about lac operon. (a) Glucose or galactose may bind with the repressor and inactivate it (b) In the absence of lactose the repressor binds with the operator region (c) The z-gene codes for permease (d) This was elucidated by Francois Jacob and Jacque Monod The correct statement are |
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During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure. What is its DNA-binding sequence? |
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