Download App

STD 12 - 7. human health and disease — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 7. human health and disease1 Mark
MCQ
Common cold is not cured by antibiotics because it is
  • ✓
    caused by a virus
  • B
    caused by a Gram­positive bacterium
  • C
    caused by a Gram­negative bacterium
  • D
    not an infectious disease.
✓

Answer

Correct option: A.
caused by a virus
a
(a) : Common cold is caused by some $100$ types of Rhino viruses. It is one of the most common infectious disease in human. Antibiotics are substances that destroy or inhibit the growth of microorganisms, particularly disease­producing bacteria and fungi. Antibiotics are obtained from microorganisms (especially moulds) or synthesized. Many antibiotics interfere with the pathogen protein synthesis. Some ($e.g.$ Penicillin) prevent cross­linking of the glycan chains of peptidoglycan molecules in bacterial cell walls. Since the viruses do not possess cell wall and their own protein synthesising apparatus, they are not attacked by antibiotics.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from STD 12 - 7. human health and disease→STD 12 - 7. human health and disease — all question types→Biology STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Which one of the following is highly evolved
→
The male gametes of rice plant have $12$ chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seedling will be, respectively:
→
Meiosis is best observed in dividing.
→
Two genes $'A\ ’$ and $'B\ ’$ are linked. In a dihybrid cross involving these two genes, the $\mathrm{F}_1$ heterozygote is crossed with homozygous recessive parental type $\text{(aa bb)}.$ What would be the ratio of offspring in the next generation?
→
Big holes in Swiss cheese are made by a:
→
As energy is passed from one trophic level to another, the amount of usable energy?
→
Interferon is
→
In Situ strategies includes

$I$. National parks

$II$. Wildlife sanctuaries

$III$. Biosphere reserves

$IV$. Sacred forests/Lakes

Choose the correct option

→
The creation of mutations is called as:
→
Bt cotton genes repel.
→