CBSE Questions for Class 8 Biology Cell Structure And Functions Quiz 4 - MCQExams.com

• The cytoplasm comprises cytosol and the organelles. 
• Organelles are usually membrane-bound structures inside the cell that have specific functions. 
• Some major organelles that are suspended in the cytosol are the mitochondria, endoplasmic reticulum, Golgi apparatus, vacuoles, lysosomes, and in plant cells, chloroplasts.

• The smallest cell is Mycoplasma (0.1-0.5 $$\mu m$$ ). 
• The bacterial cell measures 3-5 $$\mu m$$ in length. 
• Erythrocytes (RBCs) are 6-8 $$\mu m$$ in diameter. 
• The largest cell is the egg of an ostrich.

A nucleus is a membrane-bound organelle that contains the cell's chromosome. contains the genetic material responsible for hereditary. A chromosome is a long DNA molecule with the genetic information of an organism. Thus, the nucleus is responsible for carrying and transferring hereditary characteristics.

Hence, the correct option is A.

• The chloroplast is a plastid which contains chlorophyll (green pigment) within the thylakoid membranes of the organelle.
• This organelle is present in the green parts of plants where photosynthesis takes place.
• The chlorophyll pigment captures the sunlight and converts it into chemical energy and thus, helps in the process of photosynthesis.
• This organelle is absent in an animal cell.
• So, the correct answer is 'Chloroplasts'.

$$\textbf{Correct option: }$$ B

$$\textbf{ Solution: }$$

$$\textbf{ Option (a): }$$

$$\bullet$$ A multicellular organism contains more than one cell. 

$$\bullet$$ This type of organism contain various types of cells which perform different functions. 

$$\textbf{ Option (b): }$$

$$\bullet$$ The unicellular organism are the single celled organism. 

$$\bullet$$ This single celled organism is responsible for performing all function of the organism metabolism. 

$$\textbf{ Option (c): }$$

Acellular organism are not made up of cells or divided into cells. 

$$\textbf{ Option (d): }$$

Plants are the multicellular and eukaryotic organisms. 

 Hence, the correct option is (b).