Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

Neha while learning for her test, got confused how aerobic pyruvic acid is transported to mitochondria for further oxidation. She asked her elder sister (who is a graduate in biology) about this and also asked her to explain the same process in detail. Her sister explained her that it gets completely oxidised into CO₂ and water along with the formation of ATP.

1. Mention the sites in the mitochondria, where these events occur.
2. What happens to pyruvic acid before it enters 'Krebs' cycle?
3. Write the summary equation for the 'Krebs' cycle.
4. Mention the value implicit through Neha's character.

Bring out the differences between striated and smooth muscles.

Explain the composition of triglyceride.

Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What a loss of vegetation!

How is expiration carried out under normal physiological conditions?

Sporozoans are parasitic protozoan protists which lack locomotory organelles atleast in trophozoite stage.

1. Where are they found?
2. What kind of nutrition they have?
3. Do they have nucleus?
4. What is the mode of reproduction?
5. List any four examples of sporozoans.

How is the cardiac impulse conducted to the ventricles to initiate ventricular systole?

Examine the following diagram and answer the following questions:


i. What is the diagram representing?
ii. When point A becomes permeable to Na¹, what change occurs in the polarity of the membrane.
iii. What is the potential difference at point A called ?

How does hierarchical system of classification help scientist to unravel the mystery of living world?

Explain how hypothalamus functions as an endocrine gland?