Science (English Medium) इयत्ता ११ - CBSE Question Bank Solutions for Biology

Which mouth part of cockroach is comparable to our tongue?

Differentiate between Rough Endoplasmic Reticulum (RER) and Smooth Endoplasmic Reticulum (SER).

Eukaryotic cells have organelles which may

1. not be bound by a membrane
2. bound by a single membrane
3. bound by a double membrane

Group the various sub-cellular organelles into these three categories.

Write the function of the following:

Smooth ER

Write the function of the following:

Golgi Apparatus

Write the function of the following:

Centrioles

Electron Transport System (ETS) is located in mitochondrial ______.

What is meant by the statement “aerobic respiration is more efficient.”?

The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Explain.

Enumerate the assumptions that we undertake in making the respiratory balance sheet. Are these assumptions valid for a living system? Compare fermentation and aerobic respiration in this context.

Fill in the places with appropriate word/words.

In addition to auxin, a ______ must be supplied to culture medium to obtain a good callus in plant tissue culture.

Gibberellins were first discovered in Japan when rice plants were suffering from bakane (the foolish seedling disease) caused by a fungus Gibberella fujikuroi.

Give two functions of this phytohormone.

Gibberellins were first discovered in Japan when rice plants were suffering from bakane (the foolish seedling disease) caused by a fungus Gibberella fujikuroi.

Which property of Gibberellin caused foolish seedling disease in rice?

The rice seedlings infected with fungus Gibberlla fujikuroi is called foolish seedlings? What was the reason behind it?

Many discoveries in science have been accidental. This is true for plant hormones also. Can you justify this statement by giving an example? Also what term is used for such accidental findings?

Incidence of Emphysema – a respiratory disorder is high in cigarette smokers. In such cases ______.

Define the following terms?

Asthma

Cigarette smoking causes emphysema. Give reason.

Differentiate between Emphysema and Occupational respiratory disorder

Name the vascular connection that exists between the digestive tract and liver.