Download App

Enhancement of Food Production — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYEnhancement of Food Production4 Marks
Question
How aseptic conditions are maintained in tissue culture?
✓

Answer

  1. Glassware is sterilized by using detergents and hot air oven.
  2. Nutrient medium is autoclaved under constant pressure of $15$ lb/sq inch, continuously for $20$ minutes to sterilize it.
  3. Explant is treated with $20\%$ ethyl alcohol and $0.1\% HgCl_2.$
  4. Sterilization of inoculation chamber $($ Laminar air flow $)$ is done using $UV$ ray tube for $1$ hour before actual inoculation of explant on the sterilized nutrient medium.

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 "Answer the following in detail :" from Enhancement of Food Production→Enhancement of Food Production — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Types of fossils.
→
What are the three main types of niches?
→
Match the column A with B and rewrite correct pairs.
A B
i. Symbiotic N2 fixing bacteria VAM
ii. Free-living N2 fixing bacteria Rhizobium
iii. Phosphate solubilizer Nostoc
iv. Endomycorrhizae Microccocus
→
How citizens should sort out solid wastes?
→
Distinguish between the following.
m-RNA, t-RNA and r-RNA.
→
Define inheritance. Give statements for various laws of inheritance.
→
Only a fraction of sunlight is used for photosynthesis.
→
Column I [Organ/cells]Column II [Hormones]
(1) Corpus luteum(a) hCG
(2) Interstitial cells / Leydig's cells(b) Estrogen
(3) Placenta(c) Progesterone
(4) Graafian follicle(d) Testosterone
→
Classify the given specific effects of different types of auxins in Column A and complete Column B with the examples.
(IAA, NAA, 2, 4-D, IBA, 2, 4, 5-T)
Column AColumn B
(1) Selective synthetic herbicide————-
(2) Seedless fruits————
(3) Flowering in pineapple————-
(4) Synthetic auxin————-
(5) Agent orange————
→
Why do you think the amount of DDT is maximum in birds?
→