Download App

STD 12 - 8. microbes in human welfare — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 8. microbes in human welfare1 Mark
MCQ
Biogas contains
  • A
    $30\;\% -40\;\%$ $Methane$
  • B
    $50\;\% -70\;\% CO_2$
  • ✓
    $50\;\% -70\;\%$ $Methane$
  • D
    $20\;\%$ $Methane$
✓

Answer

Correct option: C.
$50\;\% -70\;\%$ $Methane$
c
Biogas contains
$CH_4 -50-70\;\%$
$CO_2 -30-40\;\%$
$H_2, H_2S etc -10\;\%$

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 - 8. microbes in human welfare→STD 12 - 8. microbes in human welfare — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

$A$ : Initial growth of pollen tube takes place on expenditure of food present in the stigma and style.
$R$ : Pollen tube travels intracellularly and chemotactically.
→
Which of the following is incorrect
→
How many of the given statements $(i-iv)$ is/are correct?

$i.$ In transcription, adenosine pairs with uracil.

$ii.$ Regulation of lac operon by repressor is referred to as positive regulation.

$iii.$ The human genome has approximately $50,000\; genes.$

$iv. $ Haemophilia is a sex-linked recessive disease.

→
Mutation is:
→
Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on:
→
Which one of the micro-organism is used for production of citric acid in industries?
→
Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis?

$(a)$ It results in the formation of haploid gametes

$(b)$ Differentiation of gamete occurs after the completion of meiosis

$(c)$ Meiosis occurs continuously in a mitotically dividing stem cell population

$(d)$ It is controlled by the Luteinising hormone (LH) and FollicleStimulating Hormone (FSH) secreted by the anterior pituitary

$(e)$ It is initiated at puberty

Choose the most appropriate answer from the options given below:

→
If a pea plant is represented by $Rr$, what type of information is obtained
→
A plant having the genotype AAB bCC will produce ______ kinds of gametes.
→
A malfunction of the lymph nodes would most likely interfere with the
→