MCQ
Commercial extraction of penicillin was done by
- AAlexander Fleming
- BErnest Chain
- CHoward Florey
- ✓More than one option is correct
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$A$. Out of one pair of factors one is dominant and the other is recessive.
$B$. Alleles do not show any expression and both the characters appear as such in $F_2$ generation.
$C$. Factors occur in pairs in normal diploid plants.
$D$. The discrete unit controlling a particular character is called factor.
$E$. The expression of only one of the parental characters is found in a monohybrid cross.
Choose the correct answer from the options given below:
- Autogamy is genetically xenogamy
- Pollination occurs by air in grass
- Placenta is arranged in inner wall of ovary
- It is possible to store pollen grains in liquid nitrogen - $100^oC$
| List $I$ | List $II$ |
| $A$. Ringworm | $I$. Haemophilus influenzae |
| $B$. Filariasis | $II$. Trichophyton |
| $C$. Malaria | $III$. Wuchereria bancrofti |
| $D$ Pneumonia | $IV$. Plasmodium vivax |
Choose the correct answer from the options given below: