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Solution for Class 11, Biology, Plant Physiology

Question 1

(3C) (16.) The net gain of ATP molecules in glycolysis during aerobic respiration is

Topic:

Plant Physiology

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Question 2

The end product of glycolysis is

pyruvic acid
glucose
ethyl alcohol
$CO_{2}$ .

Topic:

Plant Physiology

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Question 3

(5.) The respiration in germinating seeds produces energy which can be detected in the form of

water
heat
oxygen
$CO_{2}$ .

Topic:

Plant Physiology

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Question 4

Plants can get along without respiratory organ because

each plant part takes care of its own gas exchange needs.
plants do not have great demands of gas exchange.
each living plant cell in located quite close to the surface of plant.
all of these.

Topic:

Plant Physiology

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Question 5

Rise in the water level from

X

Y

in the given experimental set-up demonstrates

aerobic respiration
anaerobic respiration
photosynthesis
transpiration pull.

Topic:

Plant Physiology

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Question 6

channel of the

CF_{0}

of the ATP synthase. The ATP synthase enzyme consists of two parts: one called the

CF_{0}

is embedded in the thylakoid membrane and forms a transmembrane channel that carries out facilitated diffusion of protons across the membrane. The other portion is called

CF_{1}

and protrudes on the outer surface of the thylakoid membrane on the side that faces the stroma. The break down of the gradient provides enough energy to cause a conformational change in the

CF_{1}

particle of the ATP synthase, which makes the enzyme synthesise several molecules of energypacked ATP. Chemiosmosis requires a membrane, a proton pump, a proton

Topic:

Plant Physiology

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Question 7

Transport over longer distances proceeds through the vascular system (the xylem and the phloem) and is called translocation. An important aspect that needs to be considered is the direction of transport. In rooted plants, transport in xylem (of water and minerals) is essentially unidirectional, from roots to the stems. Organic and mineral nutrients however, undergo multidirectional transport. Organic

Topic:

Plant Physiology

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Question 8

6 compounds synthesised in the photosynthetic leaves are exported to all other parts of the plant including storage organs. From the storage organs they are later re-exported. The mineral nutrients are taken up by the roots and transported upwards into the stem, leaves and the growing regions. When any plant part undergoes senescence, nutrients may be withdrawn from such regions and moved to the growing parts. Hormones or plant growth regulators and other chemical signals are also transported, though in very small amounts, sometimes in a strictly polarised or unidirectional manner from where they are synthesised to other parts. Hence, in a flowering plant there is a complex traffic of compounds (but probably very orderly) moving in different directions, each organ receiving some substances and giving out some others.

Topic:

Plant Physiology

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Question 9

Which of the given features cannot be seen in flowers of lily?

Superior ovary
Petals with $3 + 3$ arrangement
Bisexual flowers
$6 + 6$ arrangement of stamens

Topic:

Plant Physiology

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Question 10

(33.) Mercury

(Hg)

is generally used in anerobic respiration expeniments because it does not react with

$O_{2}$
$CO_{2}$
$H_{2} O$
air

Topic:

Plant Physiology

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Question 11

Which of the following steps of respiration is amphibolic?

Glycolysis
Oxidative decarboxylation of pyrurate
TCA cycle
Oxidative phasphorylation

Topic:

Plant Physiology

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Question 12

Amount of energy released during hydrolysis of a high energy bond of ATP is.

$73 kcal mol^{- 1}$
$3.4 kcalmol^{-}$
$7.3 kcal$ mol $^{- 1}$

Topic:

Plant Physiology

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Question 13

12.2 Essential Mineral Elements Most of the minerals present in soil can enter plants through roots. In fact, more than sixty elements of the 105 discovered so far are found in different plants. Some plant species accumulate selenium. some others gold, while some plants growing near nuclear test sites take up radioactive strontium. There are techniques that are able to detect the minerals even at a very low concentration

(1 0^{- 8} g /

m L

. The question is, whether all the diverse mineral elements present in a plant, for example, gold and

Topic:

Plant Physiology

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Question 14

14.2 GLYCOLYSIS The term glycolysis has originated from the Greek words, glycos for st and lysis for splitting. The scheme of glycolysis was given by Gu Embden, Otto Meyerhof, and J. Parnas, and is often referred to as EMP pathway. In anaerobic organisms, it is the only process in respira Glycolysis occurs in the cytoplasm of the cell and is present in all 1 organisms. In this process, glucose undergoes partial oxidation to two molecules of pyruvic acid. In plants, this glucose is derived sucrose, which is the end product of photosynthesis, or from st

Topic:

Plant Physiology

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Question 15

method, essential elements were identified and their deficiency symptoms discovered. Hydroponics has been successfully employed as a technique for the commercial production of vegetables such as tomato, seedless cucumber and lettuce. It must be emphasised that the nutrient solutions must be and nutrients adequately aerated to obtain the optimum growth. What would happen if solutions were poorly aerated? Diagrammatic views of the hydroponic technique is given in Figures

12.1

and

12.2

Topic:

Plant Physiology

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Question 16

(Sectoon A) Q. 1.Mivalent or tetrad state of chromosomes are seen in which tate of meionis

Diplotene
zygotene
Dachytene
none

Topic:

Plant Physiology

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Question 17

3.cytokineais in plant cell takes place by formation of

colf piate.
divisien of cytoptasm
formation of a fricow
none of above $Q$ . 3 in whieh type of cell division chromonome numbet got Half
Mitosis
Meosin
A mitosis
nonn

Topic:

Plant Physiology

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Question 18

Q.4) the nequence of events for which a cent duplicate its ganome, oynthesise The Ottior cornstifuent of the celi and eventually divide into two daughter cell is termed as

A

coll division b) cell growth. C) cell enlargement d) mutation Q show many ATP ate formed in an aerobic respiration. A)2. QE in fermentation the end products are

ethyl alcohol and carbon dioxide B) lactic acid and carbon dioxide C) ethyl alcohol and Iacfic acid D) none

Topic:

Plant Physiology

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Question 19

A botanist discovered a mutant plant that was unable to produce materials that form a casparian strip. This plant would be:

unable to transport water or solutes to the leaves.
unable to use its sugar from the sink.
able to exert greater root pressure than the normal plant.
unable to control the amount of water and solutes it absorbs.

Topic:

Plant Physiology

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Question 20

Which of the following statements about plasmolysis is/are true? 1. Plasmolysis occurs when water moves into the cell. I1. Cells shrink in hypotonic solutions. III. An isotonic solution balances the osmotic pressure of the cytoplasm, thus preventing plasmolysis.

I only
II only
III only
I and II only

Topic:

Plant Physiology

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Solution for Class 11, Biology, Plant Physiology

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