8. Cell: The Unit of Life

8. Cell: The Unit of Life

17 Maths Exercise Solutions

Which of the following is not correct?（ ）
A. Robert Brown discovered the cell. 
B. Schleiden and Schwann formulated the cell theory.
C. Virchow explained that cells are formed from pre-existing cells. 
D. A unicellular organism carries out its life activities within a single cell.
8.5 Eukaryotic Cells, Question No.1
Which of the following is not correct?（ ）
A. Robert Brown discovered the cell. 
B. Schleiden and Schwann formulated the cell theory.
C. Virchow explained that cells are formed from pre-existing cells. 
D. A unicellular organism carries out its life activities within a single cell.
New cells generate from
(a) bacterial fermentation
(b) regeneration of old cells
(c) pre-existing cells
(d) abiotic materials

8.5 Eukaryotic Cells, Question No.2
New cells generate from
(a) bacterial fermentation
(b) regeneration of old cells
(c) pre-existing cells
(d) abiotic materials

Match the following
Cisternae
(i) Flat membranous sacs in stroma
(ii) Infoldings in mitochondria
(iii) Disc-shaped sacs in Golgi apparatus

8.5 Eukaryotic Cells, Question No.3
Match the following
Cisternae
(i) Flat membranous sacs in stroma
(ii) Infoldings in mitochondria
(iii) Disc-shaped sacs in Golgi apparatus

Match the following
Thylakoids                                                        
(i) Flat membranous sacs in stroma
(ii) Infoldings in mitochondria
(iii) Disc-shaped sacs in Golgi apparatus

8.5 Eukaryotic Cells, Question No.4
Match the following
Thylakoids                                                        
(i) Flat membranous sacs in stroma
(ii) Infoldings in mitochondria
(iii) Disc-shaped sacs in Golgi apparatus

Match the following
Cristae
(i) Flat membranous sacs in stroma
(ii) Infoldings in mitochondria
(iii) Disc-shaped sacs in Golgi apparatus
8.5 Eukaryotic Cells, Question No.5
Match the following
Cristae
(i) Flat membranous sacs in stroma
(ii) Infoldings in mitochondria
(iii) Disc-shaped sacs in Golgi apparatus
Which of the following is correct: （ ）
A. Cells of all living organisms have a nucleus. 
B. Both animal and plant cells have a well-defined cell wall. 
C. In prokaryotes, there are no membrane-bound organelles. 
D. Cells are formed de novo from abiotic materials.
8.5 Eukaryotic Cells, Question No.6
Which of the following is correct: （ ）
A. Cells of all living organisms have a nucleus. 
B. Both animal and plant cells have a well-defined cell wall. 
C. In prokaryotes, there are no membrane-bound organelles. 
D. Cells are formed de novo from abiotic materials.
What is a mesosome in a prokaryotic cell? Mention the functions that it performs.
8.5 Eukaryotic Cells, Question No.7
What is a mesosome in a prokaryotic cell? Mention the functions that it performs.
How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?

8.5 Eukaryotic Cells, Question No.8
How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?

Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.

8.5 Eukaryotic Cells, Question No.9
Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.

What are the characteristics of prokaryotic cells

8.5 Eukaryotic Cells, Question No.10
What are the characteristics of prokaryotic cells