Go through the following diagram of Nucleosome (structural unit of chromatin). Identify its componential parts indicated by A, B and C:
A | B | C | |
(1) | RNA | Non histone | Histone |
(2) | DNA | H1 histone | Histone Octamer |
(3) | RNA | Histone Octamer |
H1 histone |
(4) | DNA | Non histone | Histone |
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
The length of DNA has 45000 base pairs. How many complete turns will the DNA molecule take?
(1) 45000
(2) 450
(3) 4500
(4) 45
The full form of ELSI is:
(1) Embedded Low Software Index
(2) Ear Lung Spleen Immunity
(3) Ethical Legal and Social Issue
(4) Endonuclease Ligase Surface Immunity
The force that holds DNA together in a double helix is:
(1) The force of the twist
(2) Covalent bonds
(3) Ionic bonds or ionic interactions
(4) Hydrogen bonds
Experiments by Avery, Macleod, and McCarty supported DNA as the genetic material by showing that:
(1) Both protein and DNA samples provided the transforming factor
(2) DNA was not complex enough to be the genetic material
(3) Only samples with DNA provided transforming activity
(4) Even though DNA was molecularly simple, it provided adequate variation to act as the genetic material
SNP which is pronounced as "snips” stands for:
(1) Small nuclear protein
(2) Single nucleotide particle
(3) Single nucleotide polymorphism
(4) Small nicking points
The length of E. coli DNA and length of DNA in a human 2N cell is:
(1) 1.36 mm and 2.2 m respectively
(2) 1.36 mm and 2.2 mm respectively
(3) 1.3 ìm and 2.2 ìm respectively
(4) 1.36 cm and 2.2 cm respectively
Identify the incorrectly matched pair:
Organism | Length of DNA |
1. Bacteriophage ϕ 174 | 5386 base pairs |
2. Bacteriophage Lambda | 48502 base pairs |
3. Escherichia coli | 4.6 X 10^6 base pairs |
4. Human beings | 3.3 X 10^9 base pairs |