Tag: botany

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Questions Related to botany

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

Tissue culture medium is sterilised by

  1. Antifungal agents
  2. Keeping at -20$^o$C
  3. Autoclaving at 120$^o$C for 15 minutes

  4. Filtering through fine sieve
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tissue culture is the growth of cells or tissues separated from an organism. This is facilitated using a liquid, semi-solid medium which is sterilized so as to prevent the contamination by autoclaving them. It is a process whereby applying heat and pressure, microbes are killed in a container.

So, the correct answer is 'Autoclaving at 120-degree Celsius for 15 minutes'

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

Which of the following yeasts is used in the preparation of beer and wine?

  1. Saccharomyces ludwigii

  2. Saccharomyces cerevisiae

  3. Schizosaccharomyces

  4. Ashbya gossypii
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Saccharomyces cerevisiae (common yeast) is a species of yeast. It is the most useful yeast, linked to wine making, baking and brewing. It is also called as baker's yeast or brewer's yeast.

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

In a microbiology laboratory, the technician uses heat to sterilise the nutrient solution that is used to grow 4. a fungus. When the heating system broke down, he sterilised the solution by passing It on a sterile environment) through a sterile filter with a pore size of 0.2 micrometers. When the fungus was grown on the filtered nutrient solution, it stopped growing and looked unhealthy within a few days. Which statements is the most likely explanation for the observed effects on the fungus ?

  1. The nutrient solution contained a virus

  2. Heating makes the glucose in the nutrient solution more digestible

  3. Filtering removed one of the larger nutrients

  4. The nutrient solution contained a bacterium that was pathogenic to the fungus.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A) Viruses inhibit the growth of other organisms by entering the host organism and using its genetic material and nutrition to reproduce. Hence, the fungus stops growing.

B) The fungus absorbs glucose. Heating glucose will destroy it and the fungus will not be able to digest it.
C)  Glucose is a micro-molecule which passes through the filter. The fungus mainly requires glucose to survive. Filtering did not affect the fungus.
D) Bacteria are too large to penetrate the filter and hence cannot affect the fungus.
So the correct answer is 'The nutrient solution contained a virus'.

Multiple choice botany why classification? modern classification system traditional method of animal classification salient features of five kingdoms classification hierarchy hierarchy of classification

Read the following statements and find out the correct statement:-
(a) Human being can move limbs, jaws,eyelids and earpinna etc.
(b) Streaming of protoplasm in unicellular organism like amoeba is a simple form of movement
(c) Movement of significant feature of living beings.
(d) movement of cilia, flagella are shown by many organism.

  1. a,b,c

  2. b,c,d

  3. c,d,a

  4. d,a,b
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Human beings can move their limbs, jaws, eyelids, and ear pinna etc. These movements are referred to them by the presence of voluntary muscles and a framework of the body that allows Movement in such possible ways.

Streaming of Protoplasm in a unicellular organism like Amoeba is a simple form of movement as it allows them to move in a media.
Movement of cilia, flagella are shown by many organisms ranging from algae, protozoa to certain animals in the animal kingdom.
However, the movement is not a significant defining feature of living beings, for example, the sponges are living beings however majority of them are immovable plants also show similar characteristics.
So the correct answer is 'd, a, b' .

Multiple choice botany why classification? modern classification system traditional method of animal classification salient features of five kingdoms classification hierarchy hierarchy of classification

Different organisms belonging to different orders are placed in a single class due to the fact that?

  1. They have all similar morphological and reproductive characters

  2. They have similar place of origin

  3. They share a common habitat

  4. They have few similar or common characters
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In biological classification, different orders are grouped into a single class because they share a set of fundamental, common characteristics.

Multiple choice botany why classification? modern classification system traditional method of animal classification salient features of five kingdoms classification hierarchy hierarchy of classification

For identifying organisms through key usually.

  1. Two contrasting characters are used

  2. One similar character is studied

  3. Two are more similar characters are used

  4. Only one statement called lead is used
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A taxonomic key works by presenting a series of choices between two contrasting characters (couplets) to identify an organism.

Multiple choice botany why classification? modern classification system traditional method of animal classification salient features of five kingdoms classification hierarchy hierarchy of classification

Algae, green plants and photosynthetic bacteria are:

  1. Autotrophic organisms

  2. Heterotrophic

  3. Decomposers

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

Autotrophic organisms are those that can produce their own food using light (photosynthesis) or chemical energy.

Multiple choice botany why classification? modern classification system traditional method of animal classification salient features of five kingdoms classification hierarchy hierarchy of classification

Virus belongs to the kingdom ___________.

  1. Protista

  2. Monera

  3. Animalia

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Five kingdom classification was given by R.H. Whittaker. Classification of viruses has always been difficult as they are said to be threshold of life. Thus viruses did not find any position in five kingdom classification.