21.

Select the answer with the correct matching of the structure, its location and function.

• Structure	Location	Function
  Eustachian	Anterior part of internal ear	Equalizes air pressure on either sides of tympanic membrane

• Structure	Location	Function
  Cerebellum	Mid -brain	Controls respiration and gastric secretions

• Structure	Location	Function
  Hypothalamus	Forebrain	Control body temperature, urge for eating and drinking

• Structure	Location	Function
  Hypothalamus	Forebrain	Control body temperature, urge for eating and drinking

Select the correct combination of the statement (A-D) regarding the characteristics of certain organisms.

A. Methanogens are Archaebacteria, which produce methane in marshy areas.
B. Nostoc is a filamentous blue-green algae, which fixes atmospheric nitrogen.
C. Chemosynthetic autotrophic bacteria synthesise cellulose from glucose.
D. Mycoplasma lacks a cell wall and can survive without oxygen.

• B, C

• A, B,C

• B, C, D

• B, C, D

Which one of the following is the correct description of a certain part of a normal human skeleton?

• Parietal bone and the temporal bone of the skull are joined by fibrous joint

• First, vertebra is axis, which articulates with the occipital condyles

• The 9th and 10th pairs of ribs are called the floating ribs

• The 9th and 10th pairs of ribs are called the floating ribs

Vegetative propagation in Pisitia occurs by 

• stolen

• offset

• runner

• runner

The 3' 5'  phosphodiester linkages inside a polynucleotide chain serve to join

• one DNA strand with the other DNA strand

• one nucleoside with another nucleoside

• one nucleotide with another nucleotide

• one nucleotide with another nucleotide

Identify the components labelled A, B, C and D in the diagram below from the list 1 to 8 given along with


1) Cristae of mitochondria
2) Inner membrane of mitochondria
3) Cytoplasm
4) Smooth endoplasmic reticulum
5) Rough endoplasmic reticulum
6) Mitochondrial matrix
7) cell vacuole
8) Nucleus

• A	B	C	D
  5	4	8	3

• A	B	C	D
  1	4	8	6

• A	B	C	D
  6	5	4	7

• A	B	C	D
  6	5	4	7

The figure given below shows the conversion of a substrate to product by an enzyme. In which one of the four option (a-d), the components of reaction labelled as A, B, C and D are identified correctly?

• A	B	C	D
  Potential energy	Transition state	Activation energy with enzyme	Activation energy without enzyme

• A	B	C	D
  Transition energy	Potential energy	Activation energy with enzyme	Activation energy with out enzyme

• A	B	C	D
  Potential energy	Transition energy	Activation energy with out enzyme	Activation energy with enzyme

• A	B	C	D
  Potential energy	Transition energy	Activation energy with out enzyme	Activation energy with enzyme

Aestivation of petals in the flower of cotton is correctly shown in

Examine the figure A, B, C, and D. In which one of the four options, all the items A, B, C and D are correct.

• A	B	C	D
  Chara	Marchantia	Fucus	Pinus

• A	B	C	D
  Equisetum	Ginkgo	Selaginella	Lycopodium

• A	B	C	D
  Selaginella	Equisetum	Salvinia	Ginkgo

• A	B	C	D
  Selaginella	Equisetum	Salvinia	Ginkgo

The correct floral formula of soybean is