We help in multiple choice tests/assignments

5. Which of the following correctly matches an organelle with its function?

a. mitochondrion . . . photosynthesis

b. nucleus . . . cellular respiration

c. ribosome . . . manufacture of lipids

d. lysosome . . . movement

e. central vacuole . . . storage

ANSWER -  Central vacuole . . . storage

mrcapable1's Question

Eukaryotic cells are complex in organization and structure, especially when you consider their small size. Consider the organelle contents of the typical eukaryotic cell. Select two organelles and compare them relative to structure and function. Describe what would be the specific probable effects on the cell if each of these organelles were lost. 


ANSWER - We choose MITOCHONDRIA and  CHLOROPLAST


SIMILARITIES  -   Both have originated from endosymbiotic bacteria
                                   Both have double outer membrane
                                   They both have their own DNA. 
                                   Both reproduce independently
                                   Both have ribosomes capable of synthesizing  proteins


DIFFERENCES -  MITOCHONDRIA                      CHLOROPLAST
                       Present in all Eukaryotes            Present in Plants , algae
                       Size is 0.5 to 10 micrometers     Size is  2 to 10 micrometers
               Breaks glucose to release energy    Builds up glucose to store energy
                         Carries out respiration              Carries out  Photosynthesis. 


>If mitochondria is removed from the cell, it can not carries out respiration and food presnt in cell can not be used to release energy. Cell will die.


>If chloroplast is absent from the plant cell , there will be no food synthesis by photosynthesis.No food ,no energy and eventually cell will die

Jessy Andrew's question

A flowering plant in a clay pot is placed in a window that has light shining through it most the day. The plant is provided with sufficient water and fertilizer.

1. Describe daily and nightly events that occur in the plant's metabolism.

ANSWER-  In daylight plants carries out 

1.Photosynthesis, process in which light energy is captured, converted and stored in simple sugar molecule. This process occurs in chloroplasts in the leaves  It is a backbone process, in the sense that all life on earth depends on it’s functioning. 

6CO₂ + 12 H₂O + light energy -> C₆H₁₂O₆ + 6O₂ +6H₂O

carbon        water                              glucose     oxygen   water

2.Respiration, process in which energy , CO2 , H2O is released from the glucose which was made through photosynthesis.

C₆H₁₂O₆ + 6O_{2   ->} 6CO₂ + 12 H₂O +energy

At nights only respiration is carried out by plants. It is said that plants release CO2 through respiration at night that is because in day plants take up much more carbon dioxide in photosynthesis than they give off in respiration.So overall we see that plants take up CO2 in day and releases in night.

1. Describe the changes that would occur in the plant is you rotated it 180^o degrees.

ANSWER-  If we rotate the the plants to 180 degrees , it will change the direction of the leaves .Leaves would change the direction and go towards the light and roots will go towards the gravity.