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8. Cell-Structure and functions Science class 8 in English Medium ncert book solutions Text Book Exercise
8. Cell-Structure and functions Text Book Exercise – Complete NCERT Book Solutions for Class 8 Science (English Medium). Get all chapter explanations, extra questions, solved examples and additional practice questions for 8. Cell-Structure and functions Text Book Exercise to help you master concepts and score higher.
8. Cell-Structure and functions Science class 8 in English Medium ncert book solutions Text Book Exercise
NCERT Solutions for Class 8 Science play an important role in helping students understand the concepts of the chapter 8. Cell-Structure and functions clearly. This chapter includes the topic Text Book Exercise , which is essential from both academic and examination point of view. The solutions provided here are prepared strictly according to the latest NCERT syllabus and follow the guidelines of CBSE to ensure accuracy and relevance. Each question is explained in a simple and student-friendly manner so that learners can grasp the concepts without confusion. These NCERT Solutions are useful for regular study, homework help, and exam preparation. All textbook questions are solved step by step to improve problem-solving skills and conceptual clarity. Students of Class 8 studying Science can use these solutions to revise important topics, understand difficult questions, and practise effectively before examinations. The chapter 8. Cell-Structure and functions is explained in a structured way, making it easier for students to connect the theory with the topic Text Book Exercise . By studying these updated NCERT Solutions for Class 8 Science, students can build a strong foundation, boost their confidence, and score better marks in school and board exams.
8. Cell-Structure and functions
Text Book Exercise
Exercise
Q1. Indicate whether the following statements are True (T) or False (F).
(a) Unicellular organisms have one-celled body. (T/F)
(b) Muscle cells are branched. (T/F)
(c) The basic living unit of an organism is an organ. (T/F)
(d) Amoeba has irregular shape. (T/F)
Answer : (a) (T), (b) (F), (c) (F), (d) (T).
Q2. Make a sketch of the human nerve cell. What function do nerve cells perform?.
Answer : The nerve cell receives and transfers messages, therby helping to control and coordinate the working of different parts of the body.
Q3. Write short notes on the following:
(a) Cytoplasm (b) Nucleus of a cell
Answer : (i) Cytoplasm : it is the jelly-like substance fou nd in between the nucleus and the cell membrane. It contains nucleus and many small structures called organelles. Cytoplasm, along with nucleoplasm, forms the living substance of the cell, called the protoplasm.
(ii) Nucleus : It is an important components of the living cell. It is generally spherical and located in the centre of the cell. It can be stained and seen easily with the help of a microscope. Nucleus is separted form the cytoplasm by a membrane called the nuclesr membrane. the liquid substance of the nucleus is termed as nucleoplasm.
Q4. Which part of the cell contains organelles?
Answer : Cytoplas m contains organelles of the cell.
Q5. Make sketches of animal and plant cells. State three differences between them.
Answer : Fig. 8.2. (a) Animal cell, (b) Plant cell.
Q6. State the difference between eukaryotes and prokaryotes.
Answer : Eukaryotes have well-organised nucleus with nuclear membrane while prokaryotes do not have this.
Q7. Where are chromosomes found in a cell? State their function.
Answer : Chromosomes are found in nucleus of the cell. They carry genes and help in inheritance i.e., transfer of characters from the parents to te offspring.
Q8. ‘Cells are the basic structural units of living organisms’. Explain.
Answer : Cells many Cells in the body acumulate to build tissue. Tissues form body organs and body organs form body system. All systems forms a body. As cells give shape to the body. This may be compared to bricks. Brickes are assembled to make a building. So, cell is called the basic structural unit of loiving organisms.
Q9. Explain why chloroplasts are found only in plant cells?
Answer : Chloroplast contain chlorophyll which synthesise food in plant by the process of photosynthesis. No photosynthesis occurs in animals. So, they do not contion chloroplasts.
Q10. Complete the crossword puzzle with the help of cules given below.
Across
1. This is necessary for photo - synthesis.
3. term for component presesnt in the cytoplasm.
6. The living substance in the cell.
8. Unit of inheritance present on the chromosomes.
Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.
Answer:
See other sub-topics of this chapter:
1. Chapter Review 2. Text Book Exercise 3. Text Book Exercise 4. Additional Questions With Solutions 5. Additional Questions With Solutions