Question

Which statement about DNA is FALSE?               a.           Nucleosides are the monomeric units of DNA.      &

Which statement about DNA is FALSE?

              a.           Nucleosides are the monomeric units of DNA.

              b.           The strands of DNA run in opposite directions.

              c.           DNA has a double-helix structure.

              d.           DNA is composed of four bases: A, T, G, and C.

The expression of the lac operon is maximal if the concentration of:

              a.           lactose is high and the concentration of glucose is high.

              b.          allolactose is high and the concentration of glucose is high.

              c.           allolactose is high and the concentration of glucose is low.

              d.           galactose is high and the concentration of glucose is low.

              e.           galactose is low and the concentration of glucose is low.

Choose the initiating codon in bacterial mRNA and an amino acid that is encoded by it.

              a.           threonine; ACG

              b.           serine; UCG

              c.           methionine; AUG

              d.           tryptophan; UGG

              e.           methionine; UAA

Signals that define the beginning and the end of protein synthesis are contained in:

              a.           tRNA.

              b.           mRNA.

              c.           the ribosome.

              d.           rRNA.

              e.           protein.

Choose the CORRECT statement about telomeric DNA.

              a.           It forms the origin of replication.

              b.           It synthesizes short stretches of RNA.

              c.           It repairs DNA.

              d.           It contains a lot of tandemly repeated hexanucleotide sequences.

              e.           It utilizes ATP.

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Homework Answers

Answer #1

Question - 1, 1st one is correct answer because DNA is made up of nucleotide monomers, not nucleoside monomer.

Question - 2, c is correct answer because lac operon act in presence of allolactose and absence of glucose.

Question - 3, c is absolutely correct answer because there is only one start codon AUG which code for methionine.

Question - 4, b is absolutely correct answer because this signal is found in mRNA.

Question - 5, d is absolutely correct answer as they replicate end of dna and they are made up of RNA.

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