Question

Biology:: CH5- FUNDAMENTAL UNIT OF LIFE

A: MCQ:


Q.1: The largest cell in the human body is -

(a)Nerve cell
(b) Muscle cell
(c)Liver cell
(d)Kidney cell


Q.2: The barrier between the protoplasm and the other environmentin an animal cell is
(a)Cell wall
(b) Nuclear membrane
(c) Tonoplast
(d) Plasma membrane


Q.3: The term ‘Cell’ was given by -

(a)Leeuwenhoek
(b) Robert Hooke
(c) Flemming
(d) Robert Brown


Q.4: Who proposed the cell theory?

(a)Schleiden and Schwann
(b) Watson and Crick
(c) Darwin and Wallace
(d)
Mendel and Morgan


Q.5: A plant cell differs from an animal cell in the absence of -

(a)EndoplasmicReticulum
(b) Mitochondria
(c) Ribosome
(d) Centrioles


Q.6: Centrosome is found in -

(a)Cytoplasm
(b) Nucleus
(c) Chromosomes
(d) Nucleolus


Q.7: The power house of a cell is -

(a)Chloroplast
(b) Mitochondrion
(c) Golgi apparatus
(d) Nucleolus


Q.8: Within a cell the site of respiration (oxidation) is the -

(a)Ribosome
(b) Golgi apparatus
(c) Mitochondrion
(d) Endoplasmic Reticulum


Q.9: Which is called ‘Suicidal Bag’?

(a)Centrosome
(b) Lysosome
(c) Mesosome
(d) Chromosome


Q.10: Ribosomes are the centre for -

(a)Respiration
(b) Photosynthesis
(c) Protein synthesis
(d) Fat synthesis


Q.11: Double membrane is absent in -

(a)Mitochondrion
(b) Chloroplast
(c) Nucleus
(d) Lysosome


Q.12: Cell organelle found only in Plant is -

(a)Golgi apparatus
(b) Mitochondria
(c) Plastids
(d) Ribosomes


Q.13: Organisms lacking nucleus and membrane bound organelle are -

(a)Diploids
(b) Prokaryotes
(c) Haploids
(d) Eukaryotes

Q.14: Animal cell is limited by -

(a)Plasma membrane
(b) Shell membrane
(c) Cell wall
(d)Basement membrane


Q.15: The network of Endoplasmic Reticulum is present in the -

a) Nucleus
(b) Nucleolus
(c)Cytoplasm
(d)Chromosomes


Q.16: Lysosome are reservoirs of -

(a)Fat
(b) RNA
(c) Secretary Glycoprotein
(d) Hydrolytic Enzymes


Q.17: The membrane surrounding the vacuole of a plant cell is called -

(a)Tonoplast
(b) Plasma membrane (c)Nuclear membrane
(d)Cell wall


Q.18: Cell secretion is done by -

(a)Plastids
(b) ER
(c)Golgi apparatus
(d)Nucleolus


Q.19: Centrioles are associated with -

(a)DNA synthesis
(b) Reproduction
(c)Spindle formation (d)Respiration


Q.20: Main difference between animal cell and plant cell is -

(a)Chromosome
(b) Ribosome
(c)Lysosome
(d) Endoplasmic Reticulum


Q.21: Animal cell lacking nuclei would also lack in -

(a) Chromosome
(b) Ribosome
(c) Lysosome
(d) Endoplasmic Reticulum


Q.22: Plasmolysis occurs due to -

(a)Absorption
(b )Endosmosis
(c)Osmosis
(d)Exosmosis


Q.23: A plant cell becomes turgid due to -

(a)Plasmolysis
(b) Exosmosis
(c) Endosmosis
(d) Electrolysis


Q.24: Solute concentration is higher in the external solution -

(a)Hypotonic
(b) Isotonic
(c) Hypertonic
(d) None of the above


Q.25: A cell placed in hypertonic solution will -

(a)Shrink
(b) Show Plasmolysis
(c) Swell up
(d) No change in shape or size

Q.26: Which of the following organelle does not have membrane?

(a)Ribosome
(b) Nucleus
(c) Chloroplast
(d)Mitochondria


Q.27: Root hair absorbs water from soil through -

(a)Osmosis
(b) Active transport
(c) Diffusion
(d)Endocytosis


Q.28: Which cell organelle is not bounded by a membrane -

(a)Ribosome
(b) Lysosome
(c)ER
(d)Nucleus


Q.29: Which of the following cellular part possess a double membrane?

(a)Nucleus
(b) Chloroplast (c)Mitochondrion
(d)All of the above


Q.30: Cristae and Oxysomes are associated with -

(a)Mitochondria
(b) Plastids
(c)Golgi apparatus
(d)Plasma membrane


Q.31: Cell organelle that acts as supporting skeletal framework of the cell is -

(a) Golgi apparatus
(b) Nucleus
(c) Mitochondria
(d) ER


Q.32: Plastids are present in -

(a)Animal cell only
(b) Plant cells only
c)Both animal cells and Plant cells
(d)Neither animal

nor plant cell


Q.33: Cell wall of plant is chiefly composed of -

(a)Hemicellulose (b) Cellulose (c)Phospholipids (d)Proteins


Q.34: Genes are located on the -

(a)Chromosomes
(b)Nucleolus
(c)Nuclear membrane (d)Plasma membrane


B: Answer the following questions:

1. Write the name of different plant parts in which chromoplast, chloroplast and leucoplast

are present.


2. If you are provided with some vegetables to cook, you generally add salt into the

vegetables. After adding salt, vegetables release water. Why?


3. How are chromatin, chromatid and chromosomes related to each other?


4. What is a cell sap? Give its composition.


5. Why is endocytosis found in animals only?


6. Differentiate between the term’s diffusion and osmosis. (any 3 points)

PLZ HELP ME ​

Answer 1

1. Nerve cell
2. plasma membrane
3. Robert hooke
4. Schleiden and Schwann
5. Centroils
6. Cytoplasm
7. Mitochondria
8. Mitochondria
9. lysosome
10. Protein synthesis
11. lysosome
12. plastid
13. prokaryotes
14. plasma membrane
15. Cytoplasm
16. Hydrolytic enzyme
17. Nuclear membrane
18. Golgi apparatus
19. Spindle formation
20. lysosome
21. Chromosome
22. Osmosis
23. endosmosis
24. hypertonic
25. Swell up
26. Ribosome
27. Osmosis
28. Ribosome
29. Chloroplast
30. Mitochondria
31. Mitochondria
32. plant cell only
33. Cellulose
34. Nuclear membrane

Answer of questions are

1. Chromoplast are present in flowers,fruits or any other coloured plantChloroplast are present in leaves and stems of plantleucloplast are present in anywhere in plant as they are colourless and stored food.
2. On adding salt,the external part medium is made hyertonic that concentration of water is lowered as compared to the concentration of water inside the cellThus,water is released from the vegetable due to the exosomis.
3. Chromatin are made up from coiling of a long polynucleotid strand of DNA to fit into the cellchromatid is present as a diffuse network of fine filament in the non dividing nucleus At the time of cell division,chromatin material become condensed inti rod like structure is called chromosome.
4. Cell sap is the fluid present inside the large vacuoles of the cell It is non living and contain water,salts,glucose,amino acid etc
5. Endocytosis is only seen in animal cell but not in plant cell because in plant cell wall is present which is very tough and rigidso it is not possible to perform endocytosis.
6. Diffusion-The movement of parties from an area of higher concentration to lower concentration Osmosis-The movement of water molecules from higher concentration to lower concentration through a semi permeable membrane.

I hope you understand please mark me as brain list plz plz plz...

Answer 2

Answer:

answer for 2.why do vegetables release water when we add salt.

Explanation:

This process is said as exosmosis that is water from the higher to the lower concentration.(Osomis is water from lower to higher concentration.) the concentartipn of water in vegetables in higher or greater than the outside environment.so, the water comes out and shrinks means it absords.