Tag: botany

Questions Related to botany

Hops used in flavouring beer are.

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. Fruits of Humulus

  2. Seeds of Humulus

  3. Dried petals of Humulus

  4. Dried sepals of Humulus

Show answer
Correct Option: C
Explanation:

Hops used to provide a distinct flavour to beer are actually the flowers of Humulus lupulus

So the correct answer is  'Flowers of Humulus'

Aseptic culture means

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. Absence of life

  2. Presence of bacteria

  3. Absence of other organisms like microbes

  4. Parthenogenetic development

Show answer
Correct Option: C
Explanation:

Aseptic culture means culture which takes place in the absence of harmful microbes or other contaminants. During tissue culture, the cells are kept under the aseptic condition to avoid contamination caused by microbes because the microbes inhibit the growth of the cell and utilize the nutrients provided for the plants in the media for their growth as they have the ability to multiply fast. The aseptic condition during culture can be maintained by the process of heating, fumigation of lab, autoclave apparatus before use, wiping the apparatus with alcohol, performing the experiment in the laminar air flow under HEPA filters. 

So, the correct answer is option C.

Yeast was used in fermentation first of all by.

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. Hansen

  2. Pasteur

  3. Spike

  4. Jackson

Show answer
Correct Option: B

In tissue/bacterial culture glassware and nutrients are sterilised through

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. Water bath at $200^o C$

  2. Dry air oven at $200^o C$

  3. Dehumidifier

  4. Autoclave.

Show answer
Correct Option: D
Explanation:
Tissue/bacterial culture, glassware are all sterilized through autoclave. Autoclave steam sterilizes all the components under controlled pressure.
So, the correct answer is 'Autoclave'

Fermentation ability of yeast is due to

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. Amylase

  2. Galactase

  3. Zymase

  4. Invertase

Show answer
Correct Option: C
Explanation:

Zymase is the enzyme complex that catalyse the fermentation of sugar into ethanol and $CO _2$. It occur naturally in the yeast. Zymase activity varies as among the yeast strains.

It is important to boil surgical instruments before using them in an operation. It is done

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. To kill all the pathogens which may be infecting the instruments.

  2. To facilitate the handling of the instruments by the doctor.

  3. To enable the patient feel warm and comfortable at the time of operation.

  4. To kill all the pathogens present at the place of operation of the patient.

Show answer
Correct Option: A
Explanation:

It is important to boil surgical instruments before using them in an operation. It is done to kill all the pathogens which may be infecting the instruments. After the operation and surgery, the germs and pathogens are present on the instruments used during operation and surgery. So in order to kill those pathogens and bacterial cyst, the surgical instruments are boiled for 10 to 15 minutes. This will reduce the risk of transmission of disease from one person to another person.

Thus, the correct answer is 'To kill all the pathogens which may be infecting the instruments.'

Yeast is used in preparation of

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. Acetic acid

  2. Curd

  3. Ethyl alcohol

  4. Cheese

Show answer
Correct Option: C
Explanation:
Yeast is a fungal species that converts carbohydrates to carbon dioxide and alcohols.
(A)Acetic acid bacteria are responsible for the production of Acetic acid.
(B)Lactobacillus is responsible for the conversion of milk into curd.
(C)Saccharomyces cerevisiae is responsible for the production of ethyl alcohol.
(D)Lactobacillus or Streptococcus is responsible for the conversion of production of cheese.

So, the correct answer is 'Ethyl alcohol'

Product of fermentation of glucose by yeast is?

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. $(C _6H _{10}O _5) _n$

  2. $C _2H _5OH$

  3. $C _6H _{12}O _6$

  4. $CH _3OH$

Show answer
Correct Option: B
Explanation:

Yeast is a fungal species that converts carbohydrates to carbon dioxide and alcohols. Saccharomyces cerevisiae is responsible for the production of ethyl alcohol.

So, the correct answer is 'C2H5OH'C2H5OH

Which is not one of the new uses of biotechnology ?

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. Making beer and wine

  2. Cleaning up oil spills

  3. Increasing soil fertility

  4. Obtaining minerals from mining

Show answer
Correct Option: A
Explanation:

Making beer, wine, cheese, curd etc using microorganisms are classic methods of biotechnology I.e. using microbes for isolation. Of product of our use. While with advancement in technology, we have extended biotechnology to other purposes like Cleaning up oil spills, increasing soil fertility, obtaining minerals from mining etc. 

So, the correct option is 'Making beer and wine'.

A bacterial culture is treated with streptomycin and a cast is made. A few colonies are able to survive due to

botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

  1. Selection

  2. Adaption

  3. Mutation

  4. Mimicry

Show answer
Correct Option: B
Explanation:

Adaptation is the alteration in the structure or function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment. The bacteria got adapted towards the changes and hence survived.

So the correct option is 'Adaption'.