Photosynthesis

Question 1

Who did bell jar experiment And in which year?

Answer 1

Joseph Priestley in 1770

Question 2

Name the scientist who did a similar experiment as Joseph Priestley with an aquatic plant also name the plant used?

Answer 2

Jan Ingenhousz

Plants name is Hydrilla

Question 3

First action spectrum for photosynthesis

Answer 3

T. W. Engelmann

Question 4

Name the green algae used in T. W. Engelmann experiment

Answer 4

A green Alga, Cladophora

Question 5

Donor of hydrogen in plants ?

Answer 5

Water in most plants and H2S in some bacteria

Question 6

Who concluded that photosynthesis is light dependent reaction

Answer 6

Microbiologist, Cornelius van niel

Question 7

Number of chloroplast in one Mesophyll cell

Answer 7

20 - 40

Question 8

Light reaction takes place in

Answer 8

Thylakoid membrane

Question 9

Dark reaction takes place in

Answer 9

Stroma

Question 10

Photosystem in grana

Answer 10

PS I and PS II

Question 11

Photosystem in stromal lamellae

Answer 11

PS I

Question 12

Do chloroplasts change position

Answer 12

Yes chloroplast changes position according to light intensity with the help of cytoplasmic streaming

Question 13

How are chloroplast aligned

Answer 13

Chloroplasts align with their flat surfaces parallel to the wall in low light intensity and they are perpendicular to the incident light in high light intensity

Question 14

Light reaction are

Answer 14

Photochemical reaction

Question 15

Dark reaction are

Answer 15

Carbon reactions. Dark reaction does not mean that they occur in darkness or that they are not light dependent

Question 16

What are pigments

Answer 16

Pigments are chemical compound which can absorb fixed wavelength and excite electron

Question 17

State the relation between energy released and wavelength of light in a pigment

Answer 17

Energy released is indirectly proportional to wavelength of light

Question 18

What are antennae

Answer 18

They absorb light from Sun or from other pigment and pass them on to other pigments of higher wavelength

Question 19

What is reaction centre

Answer 19

The pigment which performs the chemical reaction

Question 20

Examples of antennae and reaction centre

Answer 20

Chlorophyll A is reaction centre

Chlorophyll B, carotene and xanthophyll are examples of antennae

Question 21

Three components of photosystem are

Answer 21

Pigments, electron carrier and enzyme

Question 22

Pump is responsible for generation of gradient, True or false

Answer 22

True

Question 23

Root hair is present only in the zone of

Answer 23

Maturation

Question 24

Water absorption is purely …………process

Answer 24

Passive

Question 25

What is responsible for stopping Apoplastic movement in endodermis

Answer 25

Casparian strip (Suberin)

Question 26

Why is water forced to move symplast through endodermis

Answer 26

Endodermis controls type and quantity of salute which is moving upward

Question 27

Why is Apoplast preferred than symplast

Answer 27

Because Apoplast is fast and offers no resistance while symplast offers more resistance and is a slow movement

Question 28

…………… cannot germinate and establish without the presence of mycorrhiza

Answer 28

Pinus seeds

Question 29

Root pressure is applicable when is………………… absent

Answer 29

Transpiration

Question 30

What is transpiration ratio

Answer 30

It is number of H2O loss per one CO2 entering

Question 31

Scotoactive

Answer 31

Stomata that open at night

Question 32

Father of plant physiology

Answer 32

Stapen hales