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295 questions found · practise this subject as a set
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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 101 | Which bond links adjacent nucleotides in a DNA strand? | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Easy |
| 102 | A nucleosome core consists of DNA wrapped around | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Easy |
| 103 | A double-stranded DNA sample has 20% adenine. What is the percentage of guanine? | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Medium |
| 104 | Why are histone proteins positively charged? | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Medium |
| 105 | If the distance between two consecutive base pairs is 0.34 nm, what is the approximate total length of DNA in… | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Hard |
| 106 | Which enzyme joins the discontinuously synthesised fragments of the lagging strand? | Biology/Biological Studies/Biotechnology/Biochemistry DNA replication |
Easy |
| 107 | Meselson and Stahl separated DNA of different densities using | Biology/Biological Studies/Biotechnology/Biochemistry DNA replication |
Easy |
| 108 | In the Meselson–Stahl experiment, what was observed after one generation in ¹⁴N medium? | Biology/Biological Studies/Biotechnology/Biochemistry DNA replication |
Medium |
| 109 | Why is DNA synthesis continuous on one strand but discontinuous on the other? | Biology/Biological Studies/Biotechnology/Biochemistry DNA replication |
Medium |
| 110 | E. coli cells with fully ¹⁵N-labelled DNA are grown in ¹⁴N medium for three generations. What fraction of DNA… | Biology/Biological Studies/Biotechnology/Biochemistry DNA replication |
Hard |
| 111 | In eukaryotes, which RNA polymerase transcribes the precursor of mRNA (hnRNA)? | Biology/Biological Studies/Biotechnology/Biochemistry Transcription |
Easy |
| 112 | The removal of introns and joining of exons in hnRNA is called | Biology/Biological Studies/Biotechnology/Biochemistry Transcription |
Easy |
| 113 | The coding strand of a gene reads 5′-ATGCCA-3′. What will be the sequence of the RNA transcribed from it? | Biology/Biological Studies/Biotechnology/Biochemistry Transcription |
Medium |
| 114 | In bacteria, which factor helps RNA polymerase to terminate transcription? | Biology/Biological Studies/Biotechnology/Biochemistry Transcription |
Medium |
| 115 | Why can translation begin before transcription is complete in bacteria but not in eukaryotes? | Biology/Biological Studies/Biotechnology/Biochemistry Transcription |
Hard |
| 116 | Which codon acts as the start codon and also codes for methionine? | Biology/Biological Studies/Biotechnology/Biochemistry Genetic code and translation |
Easy |
| 117 | The fact that some amino acids are coded by more than one codon shows that the genetic code is | Biology/Biological Studies/Biotechnology/Biochemistry Genetic code and translation |
Easy |
| 118 | Which part of a tRNA recognises the codon on mRNA? | Biology/Biological Studies/Biotechnology/Biochemistry Genetic code and translation |
Medium |
| 119 | The coding region of an mRNA, from the start codon AUG to the stop codon (both included), has 300 nucleotides… | Biology/Biological Studies/Biotechnology/Biochemistry Genetic code and translation |
Medium |
| 120 | In bacteria, which molecule catalyses peptide bond formation during translation? | Biology/Biological Studies/Biotechnology/Biochemistry Genetic code and translation |
Hard |