Tag: zoology

Questions Related to zoology

Lithosphere is reservoir of

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Carbon

  2. Oxygen

  3. Phosphorus

  4. Nitrogen

Show answer
Correct Option: C
Explanation:

There are 4 layers of Earth, namely lithosphere (land), hydrosphere (water), biosphere (living), and atmosphere (air). Lithosphere of Earth includes the crust and the uppermost mantle. It makes up the hard and rigid outer layer of the Earth. It is reservoir of phosphorus. The largest reservoir of phosphorus is sedimentary rocks. 

Thus, the correct answer is 'Phosphorous.' 

Crystalline rocks are natural source of

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Calcium

  2. Phosphorus

  3. Magnesium

  4. Sulphur

Show answer
Correct Option: B
Explanation:

There are 4 layers of Earth, namely lithosphere (land), hydrosphere (water), biosphere (living), and atmosphere (air). Lithosphere of Earth makes up the hard and rigid outer layer of the Earth. It is reservoir of phosphorus. The largest reservoir of phosphorus is sediments or sedimentary rocks. Crystalline rocks are sedimentary rocks. They are the natural source of phosphorous.  

Thus, the correct answer is 'Phosphorous.' 

Out of nutrient cycles of sulphur (a) phosphorus (b) carbon (c) and nitrogen (d), which one is sedimentary?

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. a only

  2. b only

  3. c only

  4. a and b only

  5. c and d only

Show answer
Correct Option: D
Explanation:

Biochemical cycle is also called as biogeochemical cycle or nutrient cycle. Biochemical cycle with gaseous phase includes various cycles like carbon cycle, nitrogen cycle, oxygen cycle. The nitrogen, carbon and oxygen are found in the gaseous form in the atmosphere. Calcium cycle, sodium cycle, phosphorous cycle, iron cycle, magnesium cycle, sulfur cycle are sedimentary cycles.

Thus, the correct answer is 'a and b only.'

Which is not a gaseous biogeochemical cycle?

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Sulphur

  2. Phosphorus

  3. Nitrogen

  4. Carbon

Show answer
Correct Option: A,B
Explanation:

Biochemical cycle is also called as biogeochemical cycle or nutrient cycle. Biochemical cycle with gaseous phase includes various cycles like carbon cycle, nitrogen cycle, oxygen cycle. The nitrogen, carbon and oxygen are found in the gaseous form in the atmosphere. Calcium cycle, sodium cycle, phosphorous cycle, iron cycle, magnesium cycle, sulphur cycle are sedimentary cycles.

Thus, the correct answer is 'Sulphur and Phosphorus.'

In the phosphorus cycle, weathering makes phophate available first to 

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Decomposers

  2. Consumers

  3. Producers

  4. All of the above

Show answer
Correct Option: C
Explanation:

The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates. When rocks are weathered, minute amounts of these phosphates is mixed in soil and are absorbed by the roots of the plants. Herbivores and other animals obtain this element from plants. 

So, the correct answer is 'Producers'

The excreta rich in phosphorus would be called as _________.

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Organic excreta

  2. Inorganic excreta

  3. Guano deposits

  4. Both B and C

Show answer
Correct Option: C
Explanation:

Marine birds plays a unique role in phosphorus cycle. These birds eat marine fish, which is rich in phosphorus . Their excreta are called a guano deposits.

Weathering of rocks makes phosphorus available to first

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Producers

  2. Decomposers

  3. Consumers

  4. None of the above

Show answer
Correct Option: A
Explanation:

There are 4 layers of Earth, namely lithosphere (land), hydrosphere (water), biosphere (living), and atmosphere (air). Lithosphere of Earth includes the crust, sedimentary rocks and the uppermost mantle. It is reservoir of phosphorus. Hence, weathering of rocks makes phosphorus available to first producers.

Thus, the correct answer is 'Producers.'

Fill up the blanks and select the correct option.
(i) EcoRI cuts the DNA between bases ___ only ____ when the sequence __  is present in the DNA.
(ii) Disruption of the cell membranes can be achieved by treating the bacterial cells, plant cells and fungal cells with enzymes respectively _, ____ and .
(iii) Since DNA has a _ charge, it moves towards the ____ of the electrophoretic chamber.

zoology genetics of the future hgp and dna fingerprinting dna fingerprinting human genome project and dna fingerprinting

  1. (i) G A, GAATTC (ii) endonuclease, cellulase, chitinase (iii) negative, anode

  2. (i) G A, GAATTC (ii) lysozyme, cellulase, chitinase (iii) positive, cathode

  3. (i) G A, GAATTC (ii) lysozyme, cellulase, chitinase negative/anode

  4. (i) G A, GAAATC (ii) lysozyme, cellulase, chitinase (iii) positive, cathode

Show answer
Correct Option: C
Explanation:

  • EcoRI cuts the DNA between bases G and A only when the sequence GAATTC is present in the DNA.
  • Disruption of the cell membranes can be achieved by treating the bacterial cells, plant cells and fungal cells with enzymes lysozyme, cellulase and chitinases respectively.
  • Since DNA has a negative charge , it moves towards the anode of the electrophoretic chamber.
So, the correct option is 'Option C' .

Choose the correct answer from the alternatives given :
Match column I with column II and select the correct option from the given codes.

Column I(Scientists) Column II(Discoveries)
A. Alec Jeffreys (i) Lac operon
B. F. Sanger (ii) Annotated DNA sequences
C. Jacob and Monod (iii) DNA fingerprinting
D. Avery, MacLeod and McCarty (iv) Transforming principle
zoology genetics of the future hgp and dna fingerprinting dna fingerprinting human genome project and dna fingerprinting

  1. A - (ii), B - (iii), C - (iv), D - (i)

  2. A - (iii), B - (ii), C - (i), D - (iv)

  3. A - (iii), B - (ii), C - (iv), D - (i)

  4. A - (i), B - (ii), C - (iii), D - (iv)

Show answer
Correct Option: B
Explanation:

Alec Jeffreys  is a British geneticist, who developed techniques for genetic fingerprinting and DNA profiling which are now used worldwide in forensic science to assist police detective work and to resolve paternity and immigration disputes. F.Sanger developed the Sanger dideoxy method of sequencing DNA and also is credited for the sequencing of fragments of automated DNA sequences called annotated DNA sequences. This was very helpful for the human genome project that could sequence the entire genetic makeup of the human being.  In 1961, Francois Jacob and Jacques Monod proposed the operon model of gene regulation in bacteria. The model was based on their study of the genes in E. coli that code for enzymes that affect the breakdown of lactose also called the Lac Operon. Avery, MacLeod and McCarty experimentally proved that DNA is the substance or the genetic material that causes transformation in bacteria. 

So, the correct option is 'A - (iii), B - (ii), C - (i), D - (iv)'.

DNA fingerprinting can't be performed without 

zoology genetics of the future hgp and dna fingerprinting dna fingerprinting human genome project and dna fingerprinting

  1. Restriction endonucleases

  2. Agarose

  3. Monoclonal antibodies

  4. Both (a) and (b)

Show answer
Correct Option: A