Identify a, b, c, d, e and/in the following table: Name of Enzyme/Bioactive Molecule Source Functions (i) a Streptococcus b (ii) c d immuno-suppressive agent in organ transplant patients (iii) Statins e f

i) a- Streptokinase; b- Dissolves blood clots Streptokinase produced by Streptococcus is used to remove blood clots from the blood vessels of a patient of myocardial infarction. ii) c- Cyclosporin A ; d- Trichoderma polysproum Trichoderma polysproum, a fungus, produces Cyclosporin A which is used as an immuno-suppressive agent in organ transplant patients. iii) e- Monascus purpureus ; f- blood-cholesterol lowering agent Monascus purpureus produces Statin which is used as a blood-cholesterol lowering agent, as it can inhibit the enzymes involved in cholesterol synthesis.

E M B I B E

Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 15

MEDIUM

12th CBSE

IMPORTANT

Earn 100

Draw a labelled diagram of the sectional view of a mature pollen grain of angiosperms. Explain the function of any two of its parts.

Important Questions on Model Question Papers 2

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 16

Identify a, b, c, d, e and/in the following table:

Name of Enzyme/Bioactive Molecule	Source	Functions
(i) a	Streptococcus	b
(ii) c	d	immuno-suppressive agent in organ transplant patients
(iii) Statins	e	f

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 16

Give reason for the following statement:

How is a child protected from a disease for which he/she is vaccinated ?

HARD

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 20

A woman with '0 blood group' marries a man with 'AB blood group'.
Work out the cross to show all the possible phenotypes and genotypes of the progeny with respect to blood groups. Explain the pattern of inheritance observed in this cross.

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 22

(a) Name the causative organisms for the following diseases:
(i) Elephantiasis (ii) Ringworm (iii) Amoebiasis
(b) How can public hygiene help control such diseases?

HARD

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 25

(a) Draw a diagrammatic sectional view of human ovary showing different stages of oogenesis
along with corpus luteum.
(b) Where is morula formed in humans? Explain the process of its development from zygote.

HARD

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 25

Draw a schematic labelled diagram of a fertilised embryo sac of an angiosperm.
Describe the stages in embryo development in a dicot plant.

HARD

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 26

(a) Work out a dihybrid cross up to F₂generation between pea plants bearing violet coloured axial flowers and white coloured terminal flowers. Give their phenotypic ratio.
(b) State the Mendel's law of inheritance that was derived from such a cross.

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 19 - Model Question Papers 2>MODEL QUESTION PAPER>Q 1

State where do the signals for parturition originate from in humans.