Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology introduction to microbiology commercial use of microorganism microbes in household and industry food production and microorganisms

Which of the following is the microbe used in manufacturing vinegar?

  1. Streptococcus thermophilus

  2. Saccharomyces cerevisiae

  3. Acetobacter

  4. Aspergillus oryzae
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The bacteria Acetobacter aceti is involved in the conversion of ethanol formed during fermentation into vinegar. This can happen when Acetobacter bacteria acts on alcoholic beverages such as wine and, therefore, vinegar may also be an undesirable product formed during alcoholic beverage production. 

Multiple choice biology introduction to microbiology commercial use of microorganism microbes in household and industry food production and microorganisms

Rishikesh is famous for the production of _______________.

  1. Antibiotics

  2. Heavy electricals

  3. Fertilizers

  4. Transistorized radios
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Answer is option A i.e. "Antibiotics"
Rishikesh is famous for the production of Antibiotics. IDPL (Indian Drugs and Pharmaceuticals Ltd.) is situated in Rishikesh which mainly manufactures various types of antibiotics. The Rishikesh plant was commissioned in 1967 and has a largest antibiotics fermentation facility

Multiple choice biology introduction to microbiology commercial use of microorganism microbes in household and industry food production and microorganisms

First antibiotic discovered was ____________.

  1. Penicillin

  2. Ampicillin

  3. Celin

  4. Erythrocin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The first antibiotic discovered was penicillin. It was discovered in 1828 by Alexander Fleming when he noticed the growth of mold-fungus in the culture of Staphylococcus and there were no bacteria in the region where the fungus was growing. It was because the fungus was secreting the anti-biotic that had killed the bacterial cells in the culture. The fungus was recognized as Penicillium.

Hence, the correct answer is 'Penicillin'.

Multiple choice biology introduction to microbiology commercial use of microorganism microbes in household and industry food production and microorganisms

Terramycin is obtained from

  1. Streptomyces venezuelae

  2. Streptomyces aureofaciens

  3. Streptomyces rimosus

  4. Streptomyces griseus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Terramycin is an antibiotic derived from Streptomyces rimosus, a species of actinomycete isolated from a soil sample. It is amphoteric and forms a hydrochloride and a sodium salt. Terramycin had a low degree of toxicity in animals and that the crystalline hydrochloride salt possessed a wide range of antibacterial activity against both Gram-positive and Gram-negative organisms
So, the correct answer is 'Streptomyces rimosus'
Multiple choice biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

In monocotyledons, the leaves

  1. Arise at the tip of the stem only

  2. Do not sheath the stem

  3. Sheath the stem

  4. Sheath the stem only in the lower portion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The stems of monocots are usually unbranched and fleshy. They do not grow thicker from year to year. New leaves often grow wrapped in a protective sheath formed by the older leaf.

Multiple choice biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?

  1. Plumule

  2. Cotyledon

  3. Endosperm

  4. Aleurone layer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The scutellum is part of the structure of a barley and rice seed, the modified seed leaf. The scutellum can also refer to the equivalence of a thin cotyledon in monocots. It is very thin with high surface area and serves to absorb nutrients from the endosperm during germination. The scutellum is believed to contain an as yet unidentified protein transporter that facilitates starch movement from the endosperm to the embryo.
Thus, the correct answer is option B.

Multiple choice biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

Scutellum is the first leaf of

  1. Monocot

  2. Dicot

  3. Gymnosperm

  4. Pteridophytes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The scutellum is part of the structure of a barley and rice seed, the modified seed leaf. The scutellum can also refer to the equivalence of a thin cotyledon in monocots. It is very thin with high surface area and serves to absorb nutrients from the endosperm during germination. The scutellum is believed to contain an as yet unidentified protein transporter that facilitates starch movement from the endosperm to the embryo.
Thus, the correct answer is option A.