Q42. Name the parts which

(a) determines the function and development of the cell

(b) packages materials coming from the endoplasmic reticulum

(c) provides resistance to microbes to withstand hypotonic external media without bursting

(d) is site for many biochemical reactions necessary to sustain life.

(e) is a fluid contained inside the nucleus.

 

Q43. Which of the following can be made into crystal?

(a) A bacterium

(b) An Amoeba

(c) A virus

(d) A sperm 

 

Q44. Plasmolysis in a plant cell is defined as

(a) breakdown (lysis) of plasma membrane in hypotonic medium

(b) shrinkage of cytoplasm in hypertonic medium

(c) shrinkage of nucleoplasm

(d) none of them

 

Q45. Which of these options are not functions of ribosomes?

(i) It helps in manufacture of protein molecules.

(ii) It helps in manufacture of enzymes.

(iii) It helps in manufacture of hormones.

(iv) It helps in manufacture of starch molecules.

(a) (i)and(ii)

(b) (ii) and (iii)

(c) (iii) and (iv)

(d) (iv) and (i)

 

Q46. A person takes concentrated solution of salt, after some time, he starts vomiting. What is the phenomenon responsible for such situation? Explain.

 

Q47. What is Golgi apparatus?

 

Q48. Draw a neat labelled diagram of a prokaryotic cell.

 

Q49. Find out the correct sentence.

(a) Enzymes packed in lysosomes are made through RER (rough endoplasmic reticulum).

(b) Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein respectively.

(c) Endoplasmic reticulum is related with the destruction of plasma membrane.

(d) Nucleoid is present inside the nucleoplasm of eukaryotic nucleus.

 

Q50. Why does the skin of your finger shrink when you wash clothes for a long time?

 

Q51. Why do plant cells possess large sized vacuole?

 

Q52. Which organelle is known as the powerhouse of the cell? Why? 

 

Q53. Which cell organelle controls most of the activities of the cell?

 

Q54. The undefined nuclear region of prokaryotes are also known as

(a) nucleus

(b) nucleolus

(c) nucleic acid

(d) nucleoid.

 

Q55. Why is the cell called the structural and functional unit of life?

 

Q56. Cell theory was given by

(a) Schleiden and Schwann

(b) Virchow

(c) Hooke

(d) Haeckel.

 

Last modified: Tuesday, 15 June 2021, 11:36 AM