Tag: biology

Questions Related to biology

Which of the following is an advantage of building dams?

biology structure of earth electricity from water energy hydro electricity hydro energy

  1. The dams disturbs aquatic life

  2. Dams lead go large scale disturbance of aquatic life

  3. It disturbs the natural ecosystem

  4. None

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Correct Option: D
Explanation:

The dams across the Rivers can disturb the aquatic life and can lead to their large scale destruction the fishes and other water animals may enter the power generation turbines where they may get crushed.

Which of the following is not a disadvantage of building large dams for generating hydro electric power?

biology structure of earth electricity from water energy hydro electricity hydro energy

  1. Disturbance of the natural ecosystem in the surrounding forest area.

  2. Disruption of the plants and animals life.

  3. Displacement of people on a large scale.

  4. None of the above.

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Correct Option: D
Explanation:

The construction of dams for generating hydro electric power and then installation of transformers and their connection to the national grid has the following four main disadvantages:

A) Disturbance of the natural ecosystem in the surrounding forest area.

B) Disruption of the plants and animals life.

C) Displacement of people on a large scale.

D) Disruption of the aquatic ecosystem.

Which of the following is / are disadvantage of building large dams for generating hydro electric power?

biology structure of earth electricity from water energy hydro electricity hydro energy

  1. Due to construction of dams, lot of areas of rivers having continuous fresh flowing water, have to be cleared.

  2. Number of trees have to be cut.

  3. Destroys not only the plants life but also the animals and birds life dependent on them.

  4. All of the above.

Show answer
Correct Option: D
Explanation:

The construction of dams for generating hydro electric power and then installation of transformers and their connection to the national grid has the following four main disadvantages:

A) disturbance of the natural ecosystem in the surrounding forest area.

B) disruption of the plants and animals life.

C) displacement of people on a large scale.

D) disruption of the aquatic ecosystem.

At present, the contribution of hydroelectricity to the total power generation in India is

biology structure of earth electricity from water energy hydro electricity hydro energy

  1. A little more than $22$%

  2. A little more than $35$%

  3. A little more than $47$%

  4. None of these

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Correct Option: A

How many of the given structures are associated with the thylakoid membrane?
PS II, RuBisCO, LHC, PEPcase, $F _0$ of ATP synthase, cytochromes b & f.

biology photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

  1. $2$

  2. $3$

  3. $4$

  4. $5$

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Correct Option: A

Read the following statements.
i) Chloroplasts get aligned with their flat surface parallel to the cell walls to receive optimum light intensity.
ii) Water is the only electron donor in all photosynthetic organisms.
iii) ATP and NADPH are utilised in Carboxylation stage of Calvin cycle.
iv) Bundle sheath cells are characterized by having a large number of chloroplasts and impervious walls.
v) Law of limiting factors was proposed by Blackmann.
Which of the given statements are CORRECT?

biology photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

  1. (i), (iii) and (iv)

  2. (i), (ii) and (iii)

  3. (iii), (iv) and (v)

  4. (v) only

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Correct Option: A

Which cellular part is correctly described

biology nutrition - food supplying system site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

  1. Thylakoids - Flattened membranous sacs forming grana

  2. Centrioles - Sites for active RNA synthesis

  3. Ribosomes - Those in chloroplasts are larger (80 S) while those in cytoplasm are smaller (70 S)

  4. Lysosomes - Opimally active at 8.5 pH.

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Correct Option: A

The spaces inside the folds of ER membrane are known as

biology photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

  1. Thylakoids

  2. Cisternae

  3. Mesosomes

  4. Periplasmic space

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Correct Option: A

Match the following

a. Bacteria 1. Synthesis and storage of lipids
b. Sphaerosomes 2. Idiogram
c. Chloroplasts 3. Glycocalyx
d. Karyotype 4. Thylakoids
biology nutrition - food supplying system site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

  1. a-3, b-1, c-4, d-2

  2. a-3, b-1, c-2, d-4

  3. a-4, b-3, c-2, d-1

  4. a-1, b-2, c-3, d-4

  5. a-3, b-2, c-4, d-1.

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Correct Option: A

Consider the following processes.
a. $O _2$ evolution
b. $CO _2$ fixation
c. NADPH formation
d. Chlorophyll biosynthesis.
Which of these do not occur in thylakoids?

biology nutrition - food supplying system site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

  1. $1$ and $2$

  2. $2$ and $3$

  3. $3$ and $4$

  4. $2$ and $4$

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Correct Option: A