Characteristic(s) of most DNA is / are:
A. A pairs with T by 2 hydrogen bonds.
B. Antipolarity of complementary chains
C. 20Aº diameter
D. 10 bps/turn 
(1) A, C                 

(2) A, B, C, D                     

(3) B, C, D                 

(4) A, B, C

A. DNA polymorphism plays important role in evolution and speciation.
B. 99.9% nucleotides bases are exactly same in all people
C. Chromosome 1 has the fewest genes (23) and Y-chromosomes has most genes (2968)
D. BAC and YAC have been used in Human Genome Project.
(1) All correct                   

(2) All incorrect

(3) A, B, D are correct       

(4) B, C, D are correct

Which one(s) is / are correct?
A. In prokaryotes, a single type of RNA polymerase can transcribe mRNA, tRNA and rRNA.
B. In eukaryotes, RNA polymerase I transcribes rRNAs (28S, 18S, and 5.8S), whereas RNA polymerase III is responsible for the transcription of tRNA, 5srRNA, and snRNAs.
C. RNA pol II transcribes hnRNA in eukaryotes.
D. Ribosomal large subunit has p and A-sites.
(1) A, C               

(2) A, B, C, D                 

(3) B, C, D                 

(4) A, B, D

Go through the following diagram of Nucleosome (structural unit of chromatin). Identify its componential parts indicated by A, B and C:

Following is the schematic structure of transcription unit having some important components indicated by A, B, C, D and E. In which of four option the components are identified correctly:

The fact that the genetic code is almost universal in living organisms is considered to be evidence that all organisms:
(1) Are evolutionarily related

(2) Are genetically identical

(3) Have the same sequence of anticodons

(4) None of the above

In the following diagram of the lac operon, an operon for inducible enzymes, identify components and enzymes:

Alfred Hershey and Martha Chase made a big contribution in proving DNA role as the hereditary molecule. The experiment is shown in the diagram. A and C are the presence or absence of radioactivity detected in cells B and D are the presence or absence of radioactivity detected in supernatants cells. Identify A, B, C and D:

(a) A - No Radioactivity (35S) detected in cells; B - Radioactivity (32P) detected in supernatant; C - Radioactivity (35S) detected in cells; D - No Radioactivity in supernatant
(b) A- Radioactivity (35S) detected in cells; B - No Radioactivity (35S) detected in supernatant; C - Radioactivity (32P) detected in cells; D - No Radioactivity in supernatant
(c) A - No Radioactivity (35S) detected in cells; B - Radioactivity (35S) detected in supernatant; C - Radioactivity (32P) detected in cells; D - No Radioactivity in supernatant
(d) A - No Radioactivity (35S) detected in cells; B - Radioactivity (35S) detected in supernatant; C - No Radioactivity (32P) detected in cells; D - Radioactivity in supernatant

If the DNA of this virus was labeled with 32P and the protein of the virus was labeled with 35S, which molecule(s) would be present inside the cells?
(1) 35S and 32P

(2) 35S only

(3) 32P only

(4) Neither molecule would be present inside the cell

Which of the following statements is correct?
I. The biochemical nature of genetic material was not defined from the experiments conducted by Griffith
II. Working on transformation Avery et al concluded DNA is genetic material but not all biologists were convinced
III. RNA is the genetic material in TMV, QB bacteriophage etc.
IV. DNA is the predominant genetic material while RNA performs dynamic functions of messenger adapter
V. Viruses having DNA genome and having shorter life span mutate and evolve faster
(1) All are correct             

(2) I and II             

(3) All except V               

(4) III and IV