Neural Control and Coordination — BIOLOGY STD 11 Science — Question

Vikas, student of class XI had interest in physical exercises and he also used to participate in body building competitions. One day, he visited a gym where the gym trainer suggested him to consume muscle building pills available in the market and also gave him a sample of such pills. Vikas showed that sample to his biology teacher who, after examination, found it to be rich in proteins and said him that he should not take them at this age and should consult a doctor before taking anything.

1. What are the building blocks of proteins?
2. What is the importance of amino acids in an organism?
3. What is your opinion about muscle building pills available in the market?
4. What values are shown from teachers character?

Match Column I with Column II :

	Column I		Column II
(a)	Smooth muscle	(i)	Myoglobin
(b)	Tropomyosin	(ii)	Thin filament
(c)	Red muscle	(iii)	Sutures
(d)	Skull	(iv)	Involuntary

Comment on the statement - Meiosis enables the conservation of specific chromosome number of each species even though the process per se, results in reduction of chromosome number.

Bring out the differences between plant cells and animal cells.

Describe phylum Coelenterata. Give suitable examples.

Minerals are present in the soil in sufficient amounts. Do plants need to adjust the types of solutes that reach the xylem? Which molecules help to adjust this? How do plants regulate the type and quantity of solutes that reach xylem?

Describe various forms of lipid with a few examples.

Do reactions of photosynthesis called, as ’Dark Reaction’ need light? Explain.

Suresh a biology student of class XI have shortness of breath and bronchial inflammation for two weeks, when he visited to doctor, the doctor suggests him to take ephedrine. He got amazed about the utility of gymnosperms.

1. What are gymnosperms?
2. The drug ephedrine is used to treat what types of ailments.
3. Mention other products of therapeautic use from gymnosperms.
4. What values lie in Suresh's query?