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Test: Botany Mock Test - 4 - NEET MCQ


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Test: Botany Mock Test - 4 for NEET 2024 is part of NEET Mock Test Series 2025 preparation. The Test: Botany Mock Test - 4 questions and answers have been prepared according to the NEET exam syllabus.The Test: Botany Mock Test - 4 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Botany Mock Test - 4 below.
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Test: Botany Mock Test - 4 - Question 1

A system of classification, in which a large number of traits are considered, is

Detailed Solution for Test: Botany Mock Test - 4 - Question 1

There are three systems of classification -artificial, natural and phylogenetic. In the natural system of classification the organisms are arranged on the basis of all known taxonomic characters instead of one or first few. These include morphological, anatomical, cytological, physiological and biochemical characters of the organisms. The artificial system is based on one or a few characters that are easily observable.
The phylogenetic system tries to organize organisms on the basis of their genetic and phylogenetic relationships besides taxonomic characters.

Test: Botany Mock Test - 4 - Question 2

If mitotic division is restricted to G₁ phase of cell, the condition is known as

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Test: Botany Mock Test - 4 - Question 3

Lead abscission, fruit fall, bud dormancy occurs by which of the following phytohormone?

Detailed Solution for Test: Botany Mock Test - 4 - Question 3

Abscissic acid (ABA), also known as abscisin II and dormin. It is usually found in vascular plants, some fungi and some green algae. It acts as an inhibitor because it opposes the growth of promoting effect of auxins, GA and cytokinins, thus keep their activity under control. Leaf abscission, fruit fall and dormancy occurs due to abscissic acid.

Test: Botany Mock Test - 4 - Question 4

The number and types of organisms present on earth is known as -

Detailed Solution for Test: Botany Mock Test - 4 - Question 4

The number and types of organisms present on earth is known as biodiversity.

Test: Botany Mock Test - 4 - Question 5

Flowers are highly modified _______ .

Detailed Solution for Test: Botany Mock Test - 4 - Question 5

Flowers are highly modified shoot bearing nodes and modified floral leaves, which are meant essentially for sexual reproduction in plants.

Test: Botany Mock Test - 4 - Question 6

Select the incorrect statement about NADH during cellular respiration.

Detailed Solution for Test: Botany Mock Test - 4 - Question 6

Cellular respiration is the mechanism of breakdown of food materials within the cell to release energy and the trapping of this energy for synthesis of ATP. In cellular respiration, NADH is oxidised to NAD+.

Test: Botany Mock Test - 4 - Question 7
Which one has always a steeper vertical gradient?
Test: Botany Mock Test - 4 - Question 8

ATP synthesis, in photosynthesis involves the

Detailed Solution for Test: Botany Mock Test - 4 - Question 8

ATP synthesis is linked to the development of a proton gradient across the membranes of thylakoid.

Test: Botany Mock Test - 4 - Question 9

W'hich of the following statement is not correct about xylem?

Detailed Solution for Test: Botany Mock Test - 4 - Question 9

Xylem is composed of four different kinds of elements, namely, tracheids, vessels, xylem fibres and xylem parenchyma whereas companion cells are present in phloem.

Test: Botany Mock Test - 4 - Question 10

Protonema and leafy stage are the predominant stage of the life cycle of

Detailed Solution for Test: Botany Mock Test - 4 - Question 10

The predominant stage of the moss is the presence of gametophyte which consists of two stages – the first stage is protonema and the second stage is leafy stage. Protonema stage develops directly from the spores and leafy stage develops from the secondary protonema as a lateral bud.

Test: Botany Mock Test - 4 - Question 11
Cycas is similar to angiosperms in having -
Test: Botany Mock Test - 4 - Question 12

Which of the following hormone closes stomata in response to water stress?

Detailed Solution for Test: Botany Mock Test - 4 - Question 12

In guard cells, the plant hormone abscisic acid (ABA) inhibits stomatal opening and induces stomatal closure through the coordinated regulation of ion transport.

Test: Botany Mock Test - 4 - Question 13
Mendel in his experiments on pea considered
Detailed Solution for Test: Botany Mock Test - 4 - Question 13
Being surrounded by other Monks with the same beliefs only strengthened them. Gregor Mendel conducted hybridization experiments on around 29,000 pea plants. Peas were an ideal choice for Mendel to use because they had easily observable traits there were 7 of which he could manipulate.Quality and quantity is two different thing quality - means the variety or the quality of work done.
Test: Botany Mock Test - 4 - Question 14
An allele is dominant if it expresses itself
Test: Botany Mock Test - 4 - Question 15

Assertion : Families are characterised on the basis of both vegetative and reproductive features of plant species.
Reason : Three different genera Solanum, Petunia and Datura are placed in the family Anacardiaceae. 

Detailed Solution for Test: Botany Mock Test - 4 - Question 15

Three different genera Solanum, Petunia and Datura are placed in the family Solanaceae.

Test: Botany Mock Test - 4 - Question 16

Albuminous seeds store their reserve food mainly in

Detailed Solution for Test: Botany Mock Test - 4 - Question 16

Endosperm is the nutritive tissue which provides nourishment to the embryo in seed plant. Albuminous seeds retain a part of endosperm as it is not completely used up during embryo development (e.g., wheat, maize, barley, castor, sunflower).

Test: Botany Mock Test - 4 - Question 17

Photorespiration is a wasteful process because

Detailed Solution for Test: Botany Mock Test - 4 - Question 17

Photorespiration is the process by which in the presence of light plant consumes oxygen and releases carbon dioxide (instead of fixing carbon dioxide) during photosynthesis, resulting in a decrease in photosynthetic output since no ATP is produced and carbon (as well as nitrogen in the form of ammonia) is lost inevitably. In this pathway there is no synthesis of sugar, ATP or NADPH, due to which photorespiration refers to as a wasteful process. This process reduces efficiency of photosynthesis in C3 plants.

Test: Botany Mock Test - 4 - Question 18

The reasons for the involvement of different enzyme in each step of glycolysis is that

Detailed Solution for Test: Botany Mock Test - 4 - Question 18

A different enzyme is involved in each step of glycolysis because enzymes are specific for their substrates and each step involves a different chemical reaction.

Test: Botany Mock Test - 4 - Question 19

Which one of the following statement is incorrect ?
(i) Epiderm al cell has sm all am ount of cytoplasm and a large vacuole.
(ii) Waxy cuticle layer is absent in roots.
(iii) Root hairs are unicellular, while stem hairs / trichomes are multicellular.
(iv) Trichomes may be branched or unbranched, soft or stiff and prevent transpiration.
(v) Guard cells are dumbell shaped in dicots and beanshaped in monocots (e.g. grass).

Detailed Solution for Test: Botany Mock Test - 4 - Question 19

Guard cells are specialized cells in the epidermis of leaves, stems and other organs that are used to control gas exchange. The guard cells are produced in pairs with a gap between them that forms a stomatal pore. Guard cells are dumbbell shaped in monocots (e.g grasses) and bean shaped in dicots.

Test: Botany Mock Test - 4 - Question 20
The correct sequence of taxonomic categories is
Test: Botany Mock Test - 4 - Question 21

Which of the following statement(s) is/are correct about mosses ?

Detailed Solution for Test: Botany Mock Test - 4 - Question 21

Mosses belong to the division Bryophyta under the Plant Kingdom and do not have true roots or stems.
They have root-like structures called rhizoids for anchorage which are multicellular and branched.
Their life cycle starts from germination of a haploid spore to form a protonema, which is filamentous or thallus-like. The gametophore plant body grows from the protonema which bears the sex-organs, archegonia and antheridia on the apices.
After fertilization, the sporophyte body undergoes meiosis to give rise to haploid spores which form the gametophytic plant body. Thus, gametophyte is the predominant stage in mosses.

Test: Botany Mock Test - 4 - Question 22

ABA is antagonistic to

Detailed Solution for Test: Botany Mock Test - 4 - Question 22

ABA counteracts many effects of GA such as induction of hydrolases and a-amylase in barley seedlings.

Test: Botany Mock Test - 4 - Question 23

Assertion : Genus Panthera, comprising lion, tiger, leopard is put along with genus, Felis in the family Felidae.
Reason : Families like Convolvulaceae, Solanaceae are included in the genera Solanum mainly based on the floral characters. 

Detailed Solution for Test: Botany Mock Test - 4 - Question 23

Plant families like Convolvulaceae, Solanaceae are included in the order Polymoniales mainly based on the floral characters.

Test: Botany Mock Test - 4 - Question 24

An advantage of cleistogamy is that

Detailed Solution for Test: Botany Mock Test - 4 - Question 24

Cleistogamy is a self-fertilization that occurs within a permanently closed flower. In cleistogamous flower, the anther and stigma lies close to each other. When anther dehisces in the flower buds, pollen grains come in contact with the stigma to effect pollination. Thus, cleistogamous flowers are invariably autogamous as there is no chance of cross - pollen landing on the stigma. Cleistogamous flowers produce assured seed set even in the absence of pollinators.

Test: Botany Mock Test - 4 - Question 25

Which of the following statement(s) is/are correct about RuBisCO?

Detailed Solution for Test: Botany Mock Test - 4 - Question 25

RuBisCO is an enzyme present in chloroplasts, involved in fixing atmospheric carbon dioxide during photosynthesis and in oxygenation of the resulting compound during photorespiration. It is the most abundant enzyme on the earth and catalyzes the carboxylation of CO2 to ribulose 1, 5-bisphosphate, initiates photorespiration when the CO2/O2 ratio is low.

Test: Botany Mock Test - 4 - Question 26

For bacteria to continue growing rapidly when they are shifted from an environment containing O2 to an anaerobic environment, they must

Detailed Solution for Test: Botany Mock Test - 4 - Question 26

For bacteria to continue growing rapidly when they are shifted from an environment containing O2, to an anaerobic environment, they must increase the rate of glycolysis.

Test: Botany Mock Test - 4 - Question 27

Which of the follow ing statements is correct?

Detailed Solution for Test: Botany Mock Test - 4 - Question 27

Lenticels are raised pores in the stem of a woody plant that allows gas exchange between the atm o sp h e re and the in tern al tissu e s. Parenchymatous cells arc usually present in cortex. The ground tissue system is divided into three main zones- cortex, pcricyclc and pith. The conjoint vascular bundles usually have the phloem located only on the outer side of the xylem.

Test: Botany Mock Test - 4 - Question 28

The earliest system of classification used -

Detailed Solution for Test: Botany Mock Test - 4 - Question 28

The earliest systems of classification used only gross superficial morphological characters such as habit, colour number and shape of leaves, etc.
They were based mainly on vegetative characters or on the androecium structure.

Test: Botany Mock Test - 4 - Question 29

Which of the following statement is not the characteristic of growth of an organism?

Detailed Solution for Test: Botany Mock Test - 4 - Question 29

All the given statements are the characteristics of growth of an organism. Growth can be defined as an irreversible permanent increase in size of an organ or its parts or even of an individual cell.

Test: Botany Mock Test - 4 - Question 30
Double fertilization process means
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