MODEL PAPER 4 BIOLOGY - MODEL PAPER 4

Electrons from excited chlorophyll molecules of photosystem II to photosystem I transferred and finally convert:

Monocotyledonous leaves are ________.

An important site for the formation of glycoproteins and glycolipids is:

The epithelial cells of Bowman's capsule are called:

The major factor which affects binding related to the partial pressure of carbon dioxide is _____.

Differentiate between stroma and grana of chloroplasts.

What is the significance of splitting of water, during photosynthesis?

Why is death considered as a regulatory process on the earth?

Write short note on the function of Thymosins

Where is the Bidder's canal located and how is it useful in frog?

A rubber band stretches and reverts back to its original position. Bubble gum stretches, but it would not return to its original position.
Is there any difference between the two processes? Discuss it with respect to plant growth (Hint: Elasticity (reversible) Plasticity (irreversible))

Distinguish between Artificial System and Phylogenetic System.

In the diagrammatic presentation of heart given below, mark and label, SAN, AVN, AV bundles, bundle of His and Purkinje fibres.

Do amino acids exist as Zwitter ion. Give its structure. Why is it formed?

Give a description of the structure of neuron.

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.

Describe the structure of the following with the help of labelled diagrams.
i. Nucleus
ii. Centrosome

Distinguish anaphase of mitosis from anaphase I of meiosis.

Explain various steps involved in cellular respiration.

Give the factors that govern the size of the cell.

Assertion (A): Acervulus is a structure which bears conidiophores.
Reason (R): Conidiophores consists of setae.

Assertion (A): Pneumotaxic centre present in the pons region of the brain.
Reason (R): Neural signal from this centre can reduce the duration of inspiration and thereby alter the respiratory rate.

Assertion (A): Inspiration can occur if the pressure within the lungs (intrapulmonary pressure) is less than the atmospheric pressure.
Reason (R): Expiration takes place when the intrapulmonary pressure is higher than the atmospheric pressure

Assertion (A): In condensation, a molecule of water is eliminated.
Reason (R): Condensation is an energy-releasing process.