Tag: botany

Questions Related to botany

Which of the following statements is not correct about fertilizer?

botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

  1. It enriches the soil with organic material

  2. It provides nutrients to the soil immediately in concentrated from

  3. It increases the crop production several times

  4. It is available in all seasons

Show answer
Correct Option: A
Explanation:

Manure enriches the soil with organic material (humus). A fertiliser does not provide any Humus to soil.

Cattle feed should contain 

botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

  1. roughage

  2. concentrate

  3. both of these

  4. none of these.

Show answer
Correct Option: C
Explanation:

Cattle diet varies from one period to another period. Generally the diet of cattle includes 15-10% of roughage and rest of them includes concentrate and other materials.

Haploid plants are preferred over diploids for mutation study because in haploids

botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

  1. Recessive mutations express immediately

  2. Induction of mutations is easier

  3. Culturing is easier

  4. Dominant mutations express immediately.

Show answer
Correct Option: A

The increase in crop yield with green manure is approximately

botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

  1. 1-10%

  2. 10-20%

  3. 30-50%

  4. 60-80%

Show answer
Correct Option: C
Explanation:

The amount of humus found in the soil also increases with higher rates of decomposition, which is beneficial for the growth of the crop succeeding the green manure crop used, and its management, its approach that of soil organic matter and microbial biomass. This resulted in the increase of the yield of the crops to about 25%- 35%.

So, the correct option is '30-50%'.

Production of plant without fertilization is done by

botany reproduction in angiospermic plants patterns of cropping rotation of crops cropping patterns

  1. Vegetative propagation

  2. Transplantation

  3. Grafting

  4. Both A and C

Show answer
Correct Option: A
Explanation:

In plants, vegetative propagation is a type of asexual reproduction in which a new plant develops from a vegetative part of plant. This vegetative part is basically a stem, root or any other part of plant which have tendency to reproduce.

Thus, the correct answer is option D.

The process of conversion of sugar into alcohol by yeast is called as

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

  1. Fermentation

  2. Pasteurisation

  3. Alcoholism

  4. All of the above

Show answer
Correct Option: A
Explanation:

Fermentation is a metabolic process that converts sugar to acids, gases or alcohol. It occurs in yeast and bacteria, and also in oxygen-starved muscle cells, as in the case of lactic acid fermentation.

Pasteurisation is a

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

  1. Sterilisation technique

  2. Immunisation technique

  3. Fermentation technique

  4. None of the above

Show answer
Correct Option: A
Explanation:

Pasteurization is the technique of heating milk at a high temperature ( 75$^0$ C) for a short period of time (15 s) and again cooling down quickly. It kills bacteria that may be in the milk, to ensure its safe consumption. Also, it increases the lifespan of milk. Therefore, pasteurisation is a 'sterilisation technique'.

Which of the following is used to disinfect contaminated utensils?

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

  1. 5% of phenol

  2. 30% of chloroform

  3. 1% isopropanol

  4. 70% of butanol

Show answer
Correct Option: A
Explanation:

Phenol usually in low concentrations is used in household used for cleaning and disinfecting purpose.Chloroform can't be used for disinfecting utensils as it is an anesthetic drug and causes dizziness.Isopropanol is a flammable reagent and also can't be used as a cleaning product.Butanol is usually used in painting or other work as thinner and also its fumes are harmful if inhaled and may cause slight irritation. so this also can't be used for disinfecting utensils. So, the correct answer is'5% of phenol'

Which of these organisms is unicellular, causes fermentation of sugar solutions and respires anerobically?

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

  1. Rhizopus

  2. Yeast

  3. Amoeba

  4. Bacteria

Show answer
Correct Option: B
Explanation:

The yeast is a type of fungal species which have unicellular cells. These cells are known to perform anaerobic fermentation of the sugars and produce alcohol and carbon dioxide. The organism respires anaerobically and breaks down the fermentable sugars in the absence of oxygen.

Thus, the correct answer is option B. 

Gamma rays are used to sterilize

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

  1. Pharmaceutical products

  2. Culture media

  3. Food

  4. Both A and C

Show answer
Correct Option: D
Explanation:

Gamma rays are used for sterilization of pharmaceutical products after their production as to prevention the growth of any microorganism that may be present in the product. It is also used for sterlization of food product to kill any harmful bacteria or other organism that are present in the food, it won't make the food radioactive. Gamma rays act as a ionising radiation and it will inhibit the growth of microorganism. So it can be used to sterilize culture media. So, the correct answer is 'Both A and C'