Tag: levels of organisation in plants

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Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

Cell wall of plant cells is formed of 

  1. Cellulose

  2. Hemicellulose

  3. Proteins

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

The cell wall is a protective outer covering of the cell. It is mostly present in plant cells. It is not present in the animal cell. It supports the contents of the cell and protects from pathogen attack and wear and tear. It is made of cellulose. Cellulose is a natural polymer made of smaller sugar units. It gives remarkable strength to the wood. 

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

Which of the following is the characteristic of plants ________________.

  1. Glucose and cellulose

  2. Pyruvic acid and glucose

  3. Cellulose and starch

  4. Starch and pyruvic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cellulose is a structural polysaccharide found in the cell walls of plants.

Plant cell wall is required not only for the structure to determine the actual shape of cells and functional properties to control inner and outer cellular communication but also for overall growth and tree expansion. Cellulose is the most significant component of plant cell walls. 
Starch is an energy storage polysaccharide found in plants.Plants need energy to grow.They use energy from sunlight to make a simple sugar, glucose.Plants make polymers - starch - out of extra glucose,so it's right there when they need it.

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

Which of the following is absent in a plant cell?

  1. Centrosome

  2. Lysosomes

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The centrosome is a microtubule-organizing centre. It is found near the nuclei of animal cells. Animal cells have another set of organelles which are not found in plant cells. These are lysosomes. The lysosomes are the cell's "garbage disposal." 
Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

Animal cells do not have 

  1. Plastid

  2. Chloroplast

  3. Cell wall

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plant and animal cells have several differences and similarities. For example, animal cells do not have a cell wall or chloroplasts but plant cells do. Animal cells are round and irregular in shape while plant cells have fixed, rectangular shapes.

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

Which of the following is a property of plants but not animals?

  1. Shape is irregular

  2. Plastids are usually absent

  3. Enclosed by a rigid cell wall

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The main difference between an animal cell and a plant cell is that plant cells have a cell wall, which the animal cells lack. The cell wall which is made up of cellulose gives the plant cell rigidity resulting in a fixed, rectangular shape. Animal cells lack the rigidity hence, they tend to have a round and irregular shape. Animal cells tend to vary greatly in appearance. The cell wall allows high pressure to build inside of the plant cell without bursting. Due to this, the plant cell is able to accept large amounts of liquid through osmosis without bursting. Animal cells, which only have a thin membrane restricting access to the cell, tend to burst if they absorb too much extra water.

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

Which of the following statements is true about the plant cell?

  1. The cytoplasm is filled up with nucleus

  2. The cytoplasm is a jelly-like mixture of cellulose

  3. Plant cells contain a rigid cell wall made up of cellulose

  4. There are plenty of chloroplast granules in plant root cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cellulose forms an integral part of the cell wall which provides strength and rigidity to the cell. It helps to maintain the structural integrity of a particular cell. Cellulose is a complex polysaccharide which is made up of β(1→4) linked D-glucose units.

Thus, the correct answer is option C. 

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

In which of the following organisms you observe a cell with three different types of large organelles each bounded by two membranes?

  1. A plant

  2. A virus

  3. A fungus

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

The plant cell contains three different types of cell organelles which have two membranes. The chloroplast, mitochondria and the nucleus are the organelles which are surrounded by double membranous structures. The chloroplast is involved in photosynthesis, mitochondria performs respiration and the nucleus controls the activity of the other organelles. 

Thus, the correct answer is option A. 

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

Which of the following statements is true about the plant cell?

  1. The cytoplasm is filled up with nucleus.

  2. The cytoplasm is a jelly-like mixture of cellulose.

  3. Plant cells contain a rigid cell wall made up of cellulose.

  4. There are plenty of chloroplast granules in plant root cells.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cellulose forms an integral part of the cell wall which provides strength and rigidity to the cell. It helps to maintain the structural integrity of a particular cell. Cellulose is a complex polysaccharide which is made up of β(1→4) linked D-glucose units.

Thus, the correct answer is option C. 

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

Which of the following is correct in plant cell?

  1. Bigger vacuole with rigid cell wall.

  2. Centriole takes part in cell division.

  3. Centrosome are inactive in non-dividing cell.

  4. Absence of cell membrane.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vacuoles are found in almost all the cells. A plant cell usually has a large central sap vacuole. Most mature plant cells have one large vacuole that typically occupies more than 30% of the cell's volume, and that can occupy as much as 80% of the volume for certain cell types and conditions. Another important characteristic of a plant cell is the presence of a cellulosic cell wall. The plant cell wall is dead at maturity and is rigid. Hence, cell wall provides support and maintains the shape of a plant cell.

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

A plant cell placed in pure water will

  1. Swell up and become turgid

  2. Swell up and burst

  3. Lose water and become flaccid

  4. Shrink and die
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plant cells have a strong cell wall surrounding them. When they take up water by osmosis they start to swell, but the cell wall prevents them from bursting. As a result, the plant cells become “turgid” when they swell up and become turgid.

Thus, the correct answer is option (A).