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Botany

Description: Multiple choice questions on medical entrance
Number of Questions: 25
Created by:
Tags: plants Angiosperms Classification of Division Angiosperma Fruit Tissue Culture Pollination Plant Tissues Meristematic Tissue
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A plant parasite that cannot complete its life cycle without a host is called

  1. facultative parasite

  2. obligate parasite

  3. commensal

  4. haustoria


Correct Option: B
Explanation:

Obligate parasite is completely dependent on its host.

Dodder is an example of

  1. root holoparasite

  2. stem hemiparasite

  3. root hemiparasite

  4. stem holoparasite


Correct Option: D
Explanation:

 Dodder is a stem holoparasite which means that it is completely dependent on its host.

An example of root holoparasite is

  1. mistletoe

  2. dodder

  3. hydnora

  4. rafflesia


Correct Option: C
Explanation:

 Hydnora is a root holoparasite which means that it is completely dependent on its host.

Amphivasal vascular bundle is that in which

  1. phloem is surrounded by xylem

  2. xylem is surrounded by phloem

  3. phloem is on both the sides of xylem

  4. phloem and xylem lie in different radii


Correct Option: A
Explanation:

 Concentric vascular bundle is of two types one of them being amphivasal vascular bundle in which phloem is surrounded by xylem.

The ability of a single cell to divide and produce all differentiated cells of a plant is called

  1. oligopotency

  2. unipotency

  3. multipotency

  4. totipotency


Correct Option: D
Explanation:

 Totipotency is the ability of a cell to express the full genome and thus form the whole plant like the meristematic cells of shoots or roots.

Stele in the stem typically consists of

  1. vascular tissue and cortex

  2. vascular tissue and ground tisue

  3. vascular tissue, ground tissue and pericycle

  4. ground tissue, pericycle and cortex


Correct Option: C
Explanation:

Stele is the central portion of a stem consisting of vascular tissue, ground tissue and the outermost pericycle.

The study of pollen is called

  1. paleontology

  2. palynology

  3. paleoecology

  4. carpology


Correct Option: B
Explanation:

 The study of pollen is called palynology.

Lenticels originate in the

  1. cortex of the stem

  2. periderm of the stem

  3. pericycle of the stem

  4. vascular cambium


Correct Option: B
Explanation:

 Lenticels are formed on periderm which is the outer protective layer of woody stems.

The plant hormone which inhibits seed germination is

  1. auxin

  2. cytokinin

  3. abscisic acid

  4. gibberellin


Correct Option: C
Explanation:

 Abscisic acid is a plant hormone which inhibits seed germination and also initiates bud dormancy.

In monocots the structure which supplies food materials to growing embryo is

  1. cotyledons

  2. endosperm

  3. scutellum

  4. coleorhiza


Correct Option: C
Explanation:

 Scutellum is the equivalent of cotyledon in monocots and supplies food from the endosperm to the growing embryo.

The edible part of lychee fruit is

  1. pericarp

  2. endocarp

  3. aril

  4. seed coat


Correct Option: C
Explanation:

 Aril is a specialised outgrowth from the hilum or funiculus of the seed which covers it entirely and is the  eatable part in lychee.

Lateral roots in plants are produced by

  1. root cap

  2. endodermis

  3. pericycle

  4. root hairs


Correct Option: C
Explanation:

 Pericycle is the outermost layer of stele in plants and gives rise to lateral roots.

Peroxisomes were discovered by

  1. Christian De Duve

  2. Robert Hooke

  3. Carl Benda

  4. George Palade


Correct Option: A
Explanation:

 Christian De Duve discovered peroxisomes in addition to lysosomes.

The instrument used to measure the rate of water uptake by a leafy shoot is called

  1. potometer

  2. crescograph

  3. pyrometer

  4. manometer


Correct Option: A
Explanation:

Potometer is used to measure the rate of water uptake by plants for photosynthesis and transpiration.

The primary cell wall in plants is made of

  1. cellulose and pectin

  2. cellulose and glycan

  3. cellulose microfibrils and lignin

  4. cellulose, pectin and glycan


Correct Option: D
Explanation:

 Primary cell wall in plants is composed of polysaccharides namely cellulose, pectin and cross-linking glycans.

The 80s ribosomes are composed of

  1. 30s and 50s sub-units

  2. 40s and 60s sub-units

  3. 60s and 20s sub-units

  4. 30s and 60s sub-units


Correct Option: B
Explanation:

 Ribosome units are based on the rates of their sedimentation in a centrifuge and eukaryotic ribosomes have a value of 80 units made of 40s and 60s sub-units.

Triticale is a hybrid of

  1. rice and wheat

  2. wheat and ragi

  3. barley and ragi

  4. wheat and rye


Correct Option: D
Explanation:

 Wheat and rye are bred together to form triticale which is mainly used as a fodder crop.

Chiropterophily refers to

  1. pollination of flowers by bats

  2. pollination of flowers by birds

  3. pollination of flowers by insects

  4. pollination of flowers by wind


Correct Option: A
Explanation:

 Pollination requires agents to transfer the pollen grains and such transfer by bats is called chiropterophily.

Polyploidy in plants are introduced using

  1. tryptophan

  2. colchicine

  3. chymosin

  4. gibberellins


Correct Option: B
Explanation:

 Colchicine is a chemical widely used to double chromosome number and thus introduce polyploidy in plants.

Which of the following is the hexaploid form of wheat?

  1. Triticum durum

  2. Triticum monococcum

  3. Triticum aestivum

  4. Triticum turgidum


Correct Option: C
Explanation:

 Triticum aestivum is the common bread wheat and is hexaploid and has chromosome number six times the haploid number.

The botanical name of red bread mould used in genetical studies is

  1. stachybotris chartarum

  2. pisum sativum

  3. penicillium roqueforti

  4. neurospora crassa


Correct Option: D
Explanation:

 Neurospora crassa belongs to ascomycetes class of fungi and widely used in genetical studies.

Exine and intine are the

  1. outer and inner layers of seed coat

  2. outer and inner layers of leaf epidermis

  3. outer and inner layers of pollen grain wall

  4. outer and inner layers of a fruit


Correct Option: C
Explanation:

 Pollen grain wall is made of outer exine and inner intine layers. 

The sheath which encloses the apical meristem in a monocot embryo is

  1. coleoptile

  2. scutellum

  3. coleorhiza

  4. endosperm


Correct Option: A
Explanation:

 Coleoptile provides protection to the developing shoot.

Helical arrangement of chloroplasts is seen in

  1. chara

  2. ulothrix

  3. kelps

  4. spirogyra


Correct Option: D
Explanation:

Spirogyra, a genus of green algae have helical arrangement of chloroplasts.

A pollen grain is composed of

  1. a vegetative cell only

  2. a generative cell only

  3. both vegetative and generative cells

  4. layers of sterile cells only


Correct Option: C
Explanation:

 A pollen grain has a large vegetative cell but a small generative cell.

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