PART - 2 - Unit V : CH - 15 Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Explain various steps of respiration.

Give an account of Glycolysis. Where does it occur? What is the end product? Trace the fate of these products in both aerobic and anaerobic respiration.

Define a taxon. What is meant by taxonomic hierarchy. Give a flow diagram from the lowest to highest category for a plant and an animal. What happens to the number of individuals and number of shared characters as we go up the taxonomical hierarchy?

In the diagram shown below label A, B and C. What type of phosphorylation is possible in this?

What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.

In the figure given below, the black line (upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll a, answer the following:

1. What does the action spectrum indicate? How can we plot an action spectrum? Explain with an example.
2. How can we derive an absorption spectrum for any substance?
3. If chlorophyll a is responsible for light reaction of photosynthesis, why do the action spectrum and absorption spectrum not overlap?

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.

Take one flower each of the families-Fabaceae and Solanaceae and write its floral formulae. Also draw their floral diagram after studying them.

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?

Describe various stem modifications associated with food storage, climbing and protection.