Wilkins X-ray diffraction showed the diameter of the DNA helix as ________?

Related Mcqs:

1. Functional unit of DNA Is____________?

   A. Nucleus
   B. Genes
   C. Chromosomes
   D. Nucleolus

2. The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by ?

   A. Molecular biologists
   B. Microbiologists
   C. Freshwater biologists
   D. Social biologist

3. Each turn of DNA contain ____________ nitrogenous base pairs?

   A. 5
   B. 10
   C. 20
   D. 25

4. In lysogenic cycle the process of spearation of phage DNA from the hosts chromosome and initiation of lytic cycle is called______________?

   A. Lysis
   B. Lysogeny
   C. Induction
   D. Adsorption

5. In the lytic cycle of bacteriophage the host DNA is__________?

   A. Replicated
   B. Turn off by the protein coat.
   C. Digested into its nucleotides
   D. Turned on by the removal of the protein coat

6. Which organelles contain its own DNA?

   A. nucleus
   B. mitochondria
   C. chloroplast
   D. All of these

   Submitted by: Kiran Zafar

7. Which of the following cell organelles does not contain DNA?

   A. Nucleus
   B. Lysosomes
   C. Chloroplast
   D. None of these

   Submitted by: Nayab Idrees

8. The vaccines prepared through recombinant DNA technology are_____________?

   A. Third generation vaccines
   B. First-generation vaccines
   C. Second-generation vaccines
   D. None of these

   Submitted by: Maria Aziz

9. The DNA fragments have sticky ends due to___________?

   A. Endonuclease
   B. Unpaired bases
   C. Calcium ions
   D. Free methylation

   Submitted by: Maria Aziz

10. Bacteria protect themselves from viruses by fragmenting viral DNA with ____________?

    A. Ligase
    B. Endonuclease
    C. Exonuclease
    D. Gyrase

    Submitted by: Maria Aziz