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Biology (Medical Entrance)

Description: JKCET Biology Test - 7
Number of Questions: 35
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Tags: JKCET Biology Test - 7 Biology Plant Physiology Genetically Modified Organisms Transgenic Animals Biology and Human Welfare Biotechnology and its Application Biotechnology and Its Applications
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Mendel is famous for his experiments on:

  1. Pisum sativum

  2. Drosophila melanogaster

  3. Neurospora crassa

  4. Oenothera lamarkiana

Show answer
Correct Option: A
Explanation:

  Mendel is known for pea-plant experiments and subsequent theories on genetics. During a seven year period, Mendel experimented with pea plants in the garden owned in his monastery.

In mulberry, the inflorescence is

  1. catkin

  2. capitulum

  3. raceme

  4. spadix

Show answer
Correct Option: A

The axis of inflorescence is called

  1. pedicel

  2. petiole

  3. peduncle

  4. thalamus

Show answer
Correct Option: C

Which of the following shows apocarpous condition?

  1. Datura

  2. Ranunculus

  3. Caesalpinia

  4. Cotton

Show answer
Correct Option: B

Perianth is formed

  1. when petals and stamens are not distinguishable

  2. when only calyx is present

  3. when calyx and corolla are not distinguishable

  4. none of the above

Show answer
Correct Option: C

A complete flower is the one which has

  1. calyx and corolla

  2. calyx, corolla and androecium

  3. corolla, androecium and gynoecium

  4. calyx, corolla, androecium and gynoecium

Show answer
Correct Option: D

Bulbs of garlic and onion have

  1. greatly developed root system

  2. no leaves

  3. no stem

  4. greatly reduced stems

Show answer
Correct Option: D

Occurrence of more than one type of leaves on the same plant is called

  1. venation

  2. heterophylly

  3. vernation

  4. aestivation

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Correct Option: B

Velamen, a spongy tissue, is present in

  1. breathing roots

  2. parasitic roots

  3. tuberous roots

  4. epiphytic roots

Show answer
Correct Option: D

A flower is a modified

  1. leaf

  2. root

  3. shoot

  4. none of the above

Show answer
Correct Option: C

Pneumatophores are helpful in

  1. transpiration

  2. carbohydrate metabolism

  3. protein synthesis

  4. respiration

Show answer
Correct Option: D

Dicotyledonous leaf showing parallel venation in

  1. Smilax

  2. Ranunculus

  3. Calophyllum

  4. Dioscorea

Show answer
Correct Option: A

In Nepenthes, the pitcher is formed from

  1. stipule

  2. leaf base

  3. lamina

  4. leaf apex

Show answer
Correct Option: C

Prop roots of ficus are

  1. positively geotropic

  2. negatively geotropic

  3. positively heliotropic

  4. negatively hydrotropic

Show answer
Correct Option: A

The eyes of potato are useful for

  1. storage

  2. vegetative reproduction

  3. sexual reproduction

  4. none of these

Show answer
Correct Option: B

Ginger is a stem and not a root because

  1. it is bitter in taste

  2. it has nodes and internodes

  3. it is non-green in colour

  4. it stores food

Show answer
Correct Option: B

The term phyllotaxy is used to describe

  1. type of ovary in a plant

  2. mode of arrangement of leaves on the stem

  3. type of roots

  4. arrangement of sepals and petals in a flower

Show answer
Correct Option: B

Root hairs occur in the

  1. root cap

  2. region of cell elongation

  3. meristematic zone

  4. region of maturation

Show answer
Correct Option: D

Pure homozygous offsprings in a dihybrid cross in F2 generation will be

  1. 1/2

  2. 1/4

  3. 1/8

  4. 1/16

Show answer
Correct Option: C

The most highly evolved type of inflorescence is

  1. hypanthodium

  2. spadix

  3. polychasial cyme

  4. capitulum

Show answer
Correct Option: D

Tegmen develops from

  1. outer integument

  2. inner integument

  3. chalaza

  4. funicle

Show answer
Correct Option: B

A carpel develops into

  1. plant

  2. seed

  3. fruit

  4. flower

Show answer
Correct Option: C

The genotype ratio in F2 generation of monohybrid cross will be

  1. 1 : 2

  2. 1 : 2 : 1

  3. 3 : 1

  4. 1 : 1

Show answer
Correct Option: B
Explanation:

Random union of equal numbers of R and r gametes produced an F2 generation with 25% RR and 50% Rr and 25% rr.

The aerial stem of banana is a

  1. true herbaceous stem

  2. false stem

  3. corm

  4. rhizome

Show answer
Correct Option: B

Mulberry fruit is a/an

  1. aggregate fruit

  2. composite fruit

  3. dry fruit

  4. simple fruit

Show answer
Correct Option: A

Law of independent assortment can be explained with the help of (or proved by)

  1. test cross

  2. back cross

  3. monohybrid cross

  4. dihybrid (or trihybrid) cross

Show answer
Correct Option: D
Explanation:

Law of independent assortment can be explained with the help of (or proved by) dihybrid (or trihybrid) cross.

Potato belongs to the family

  1. Solanaceae

  2. Compositae

  3. Gramineae

  4. Cruciferae

Show answer
Correct Option: A
Explanation:

Potato belongs to the family Solanaceae.The potato belongs to the Solanaceae or nightshade family whose other members include tomatoes, eggplants, peppers, and tomatillos. They are the swollen portion of the underground stem which is called a tuber and is designed to provide food for the green leafy portion of the plant. If allowed to flower and fruit, the potato plant will bear an inedible fruit resembling a tomato.

Cyathium inflorescence is characteristic of family

  1. Compositae

  2. Euphorbiaceae

  3. Cruciferae

  4. Solanaceae

Show answer
Correct Option: B
Explanation:

Cyathium inflorescence is characteristic of family Euphorbiaceae.The flower-like characteristics of the cyathia are underlined by brightly coloured nectar glands and often by petal-like appendages to the nectar glands, or brightly coloured, petal-like bracts positioned under the cyathia.

The new name of the family compositae is

  1. Brassicaceae

  2. Asteraceae

  3. Lamiaceae

  4. Bombacacae

Show answer
Correct Option: B
Explanation:

The new name of the family compositae is Asteraceae.Most members of Asteraceae are herbaceous, but a significant number are also shrubs, vines, or trees.

Which of the following seeds is non-endospermic?

  1. Maize

  2. Pea

  3. Wheat

  4. Rice

Show answer
Correct Option: B

Outer membrane of maize seed is called

  1. aleurone layer

  2. epidermis

  3. scutellum

  4. epithelium

Show answer
Correct Option: A
Explanation:

Aleurone is a protein found in protein granules of maturing seeds and tubers. The term also describes one of the two major cell types of the endosperm, the aleurone layer. The aleurone layer is the outermost layer of the endosperm, followed by the inner starchy endosperm.

Micropyle in seed helps the entry of

  1. pollen tube

  2. water

  3. male gamete

  4. none of these

Show answer
Correct Option: B
Explanation:

Micropyle in seed helps the entry of water during germination.The entry of water activates the embryo cells.

Fruit that develops from hypanthodium inflorescence is termed as

  1. syconus

  2. sorosis

  3. samara

  4. siliqua

Show answer
Correct Option: A
Explanation:

A collective fleshy fruit, in which the ovaries are hidden within a hollow receptacle, as in the fig.

Marginal placentation is found in the family

  1. Leguminosae

  2. Cucurbitaceae

  3. Malvaceae

  4. Cruciferae

Show answer
Correct Option: A
Explanation:

Marginal placentation is found in most of the members of the family Leguminosae.he ovary in which the placenta forms a ridge along the ventral suture of the ovary and the ovules develop on two separate rows is known to have marginal placentation.

Which one of the following is a false fruit?

  1. Apple

  2. Walnut

  3. Mango

  4. Cashew nut

Show answer
Correct Option: A
Explanation:

In apple, major part of fruit is formed from thalamus not from ovary. So, it is known as false fruit.

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