objective questions set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 3 EXERCISES
The following question based on organic chemistry topic of general science mcq
(a) nitrogen
(b) hydrogen
(c) carbon
(d) sulphur
The correct answers to the above question in:
Answer: (c)
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Question : 1
The prerequisites for biotechnological production of antibiotics is
- to search an antibiotic producing micro-organism
- to isolate the antibiotic gene
- to join antibiotic gene with E.coli plasmid
a) 1 and 3
b) 1, 2 and 3
c) 2 and 3
d) 1 and 2
Answer »Answer: (b)
Question : 2
What is “Kiss of death” ?
a) A good wine flavour working on which scientist won the 2004 Nobel Prize in Chemistry.
b) A flower whose smell was the basis of a discovery on smell that led to award of 2004 Nobel Prize in Medicine.
c) A chemical whose discovery ultimately won the scientists the 2004 Nobel Prize in Chemistry.
d) A network in brain associated with smell whose discovery led the scientists win the 2004 Nobel Prize in Physiology and Medicine.
Answer »Answer: (c)
Aaron Ciechanover, Avram Hershko and Irwin Rose have been awarded the Nobel Prize in Chemistry in 2004 for “...helping to understand how the human body gives the ‘kiss of death’ to rogue proteins to defend itself from diseases like cancer” (Reuters, 6 October 2004).
These scientists—the former two from Israel, the latter from the US — discovered ubiquitin-mediated protein degradation.
Knowledge of ubiquitin-mediated protein degradation offers an opportunity to develop drugs against cervical cancer, cystic fibrosis and other diseases.
Question : 3
Match Column-I with Column-II :
Column-I | Column-II |
A. Carbon black | P. Water filters |
B. Diamond | Q. Fuel |
C. Coke | R. Jewellery |
D. Charcoal | S. Filler in automobiles |
a) A-P; B-Q; C-Q; D-S
b) A-S; B-R; C-P; D-Q
c) A-Q; B-R; C-S; D-P
d) A-S; B-R; C-Q; D-P
Answer »Answer: (d)
Question : 4
The heteroatoms present in CH3 — CH2 — O — CH2— CH2 Cl are
- Oxygen
- Carbon
- Hydrogen
- Chlorine
a) (iii) and (iv)
b) (ii) and (iii)
c) (i) and (ii)
d) (i) and (iv)
Answer »Answer: (d)
Question : 5
Pentane has the molecular formula C5H12. It has
a) 16 covalent bonds
b) 12 covalent bonds
c) 5 covalent bonds
d) 17 covalent bonds
Answer »Answer: (a)
i.e., 16 covalent bonds.
Question : 6
How many different isomers are possible for a hydrocarbon with the molecular formula C4H10?
a) 3
b) 2
c) 1
d) 5
Answer »Answer: (b)
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