Tag: organisation of the organism

Quizzes (24) Questions (55)

Questions Related to organisation of the organism

Multiple choice biology cell structure and micro-organisms plant and animal cell cell structure organisation of the organism

Which of the following life processes does not take place in animal cells?

  1. Movement

  2. Respiration

  3. Excretion

  4. Photosynthesis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The animal cells lack the cellular organelle chloroplast. The chloroplast or the chlorophyll pigments are required for carrying out photosynthesis by capturing solar energy. The animal cells devoid of this organelle cannot perform photosynthesis.

Thus, the correct answer is option D. 

Multiple choice biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

Interconvertible organelle in plant cell is 

  1. Plastids

  2. Vacuole

  3. Mitochondria

  4. Lysosome
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Chloroplasts (Green Plastids) are plant cell organelles which take part in photosynthesis and temporary or permanent storage of starch. In green alga, chloroplasts are of various shapes and sizes but chloroplasts of higher plants are disc-shaped with a diameter of 4 to 6 micrometer and thickness of 2 to 4 micrometer. In embryophytes, they are the second largest cell organelle, smaller only to the nucleus.
Chromosomes are not distinct cell organelles.
Both Golgi apparatus and mitochondria are much smaller than chloroplasts.
So, the correct answer is 'Plastids'
Multiple choice biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

Select the wrong statement from the following.

  1. The chloroplasts are generally much larger than mitochondria

  2. Both chloroplasts and mitochondria contain an inner and an outer membrane

  3. Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane

  4. Both chloroplasts and mitochondria contain DNA
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Thylakoids and thylakoid spaces are exclusive internal compartments found inside chloroplasts, not mitochondria. Mitochondria have cristae and an intermembrane space, making statement C factually incorrect and thus the correct answer to a 'wrong statement' question.

Multiple choice biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

A plant cell placed in $0.7\,M$ sugar solution was found with no change in cell volume. If the same plant cell is placed in $0.7\,M$ of $NaCl$ solution , then there will be

  1. No change in cell volume

  2. Increase in cell volume

  3. Decrease in cell volume

  4. initial increase and eventually decrease in cell volume
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A plant cell shows no volume change in 0.7 M sugar solution because it is isotonic. When placed in 0.7 M NaCl solution, which dissociates into ions, the effective concentration (osmolarity) becomes higher than the cell interior, making the solution hypertonic. Water flows out of the cell, leading to plasmolysis and a decrease in cell volume.

Multiple choice biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

Planet cells that are photosynthetically  active are found in the ______ layer of leaf and are ____ cells.

  1. Epidermis ,Parenchymatous

  2. Mesophyll,Parenchymatous

  3. Mesophyll, Sclerenchymatous

  4. Aerenchyma,Collenchymatous
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Photosynthetically active plant cells are primarily parenchymatous cells containing chloroplasts, collectively forming the chlorenchyma tissue found in the mesophyll layer of leaves. Epidermal cells generally lack chloroplasts, and sclerenchymatous cells are dead and provide structural support.

Multiple choice biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

Which is incorrect for chloroplast

  1. Presence in algae and plants
  2. Release $O _2$

  3. Occurs only in cells with aerobic respiration

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chloroplasts are found in photosynthetic organisms and do not require aerobic respiration to function; they are the site of photosynthesis, which is independent of the cell's respiratory state.

Multiple choice biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

In plant cell, the vacuole

  1. Contains air and lacks membrane

  2. Contains water and excretory substances but lacks membrane

  3. Contains storage protein and lipids and is membrane bound

  4. Is membrane bound, contains water and excretory substances.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In plant cells, the large central vacuole is bound by a membrane called the tonoplast and contains cell sap, which includes water, ions, and various excretory substances.