Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

The figure shows different human tissues labelled as A to D. Which option gives the correct identification of the label, its location and one feature.

  • D-Unicellular glandular epithelium, goblet cells, secrete saliva

  • B-Squamous epithelium, walls of blood vessels, form a diffusion boundary

  • A-Cuboidal epithelium, ducts of glands, secretion and absorption

  • C-Columnar epithelium, lining of stomach, secretion and absorption


D.

C-Columnar epithelium, lining of stomach, secretion and absorption

The given figure

A is squamousepithelium, found in walls of blood vessels and air sacs of lungs and is involved in functions like forming a diffusion layer.

B is cuboidal epithelium, found in ducts of glands and tubular parts of nephrons of kidney and its main functions are secretion and absorption.

C is columnar epithelium, found in lining of stomach and intestine and helps in secretion and absorption.

D is ciliated columnar epithelium, present in inner surface of hollow organs like bronchioles and Fallopian tubes and helps to move particles or mucus in a specific direction over the epithelium.


2.

Gerdy fibres are

  • ligament of neck 

  • ligament of ankles

  • ligament of palm

  • ligament of face


C.

ligament of palm

Gerdy fibres are the superficial transverse ligament of the palm.


3.

Select the option that contains all plants which produce non-endospermic seeds.

  • Gram, Pea, Bean, Groundnut

  • Castor, Peanut, Orchid, Wheat

  • Coconut, Walnut, Wheat, Gram

  • Castor, Maize, Coconut, Orchid


A.

Gram, Pea, Bean, Groundnut

Non-endospermic seeds or exalbuminous seeds have no residual endosperm as it is completely consumed during embryo development. Gram, pea, bean and groundnut have non-endospermic seeds


4.

Identify the accurate explanation of mesosome. It is

  • a specialised structure of prokaryotic cell formed by extension of plasma membrane into the cytoplasm

  • the middle layer of the prokaryotic cell wall

  • the organelle of eukaryotic cell which helps in lipid synthesis

  • the middle layer of eukaryotic cell wall.


A.

a specialised structure of prokaryotic cell formed by extension of plasma membrane into the cytoplasm


5.

An example of stretch reflex triggered by passive muscle movement is the

  • tendon reflex

  • ipsilateral reflex

  • flexor reflex

  • patellar reflex


D.

patellar reflex

A stretch reflex is the contraction of a muscle in response to a passive stretching of a muscle spindle within a muscle. This reflex enables the body to correct any unintended changes in body posture in a timely manner without waiting for input from the cerebral cortex as well as keeps appropriate tone in muscles. A well known example of stretchreflex is patellar reflex or knee jerk reflex, i.e., sudden kicking movement of the lower leg in response to a sharp tap on patellar tendon.


6.

Identify the incorrect statement about ABA growth regulator

  • It increases the tolerance of plants against different stresses.

  • It acts as general plant growth inhibitor and inhibitor of metabolism.

  • It helps in seed maturation and dormancy.

  • It promotes morphogenesis and differentiation of shoots.


D.

It promotes morphogenesis and differentiation of shoots.

Abscisic acid (ABA) is a growth inhibitor. Both auxins and cytokinins are essential for morphogenesis or differentiation of tissues and organs. Auxins stimulate root formation however when cytokinins are in excess stem buds develop.


7.

Some salient features and phyla of organisms are given below. Select the option which shows correct combination of organism, its phylum and salient features.


B.

Hydra shows radial symmetry, Ancylostoma is an aschelminth. Octopus shows bilateral symmetry and also lacks an external skeleton of shell.


8.

Select the mismatched pair out of the following

  • Rhizome - Dryopteris, Nelumbo nucifera

  • Corm - Crocus sativus, Amorphophallus

  • Sucker -Curcuma domestica, Zingiber officinale

  • Tuber -Helianthus tuberosus, Solanum tuberosum


C.

Sucker -Curcuma domestica, Zingiber officinale

Sucker is a special non-green slender stem branch which arises from underground base of an erect shoot or crown. It grows horizontally in soil and ultimately comes out to form a new aerial shoot or crown. The process is repeated. Each sucker has one or more nodes with scale leaves and axillary buds, e.g., Chrysanthemum. Curcuma domestica and Zingiber officinale both are the examples of rhizomes


9.

Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms

  • Perianth and no integuments

  • Embryo development and apical meristem

  • Absence of resin duct and leaf venation

  • Presence of vessel elements and absence of archegonia


D.

Presence of vessel elements and absence of archegonia

Unlike Cycas and Pinus, Gnetum shows the occurrence of vessel elements and the complete absence of archegonia in female gametophyte. Thus, Gnetum shows affinities with angiosperms. Besides its resembles with angiosperms in several other aspects like presence of tetrasporic embryo sac, free nuclear divisions in the embryo sac, two cotyledonous embryo, etc


10.

Select the option that correctly matches characteristic features with the group of three animals.

  • Skeleton ofspicules ­- Sycon, Adamsia, Spongilla

  • Excretion by flame cells - Taenia, Fasciola, Ancylostoma

  • Mouth contains radula - Dentalium, Octopus, Ophiura

  • Jointed appendages ­- Limulus, Apis, Laccifer


D.

Jointed appendages ­- Limulus, Apis, Laccifer

In poriferans, the body is supported by a skeleton made up of spicules or spongin fibres. Sycon and Spongilla are examples of poriferans, whereas Adamsia is a coelenterate. In platyhelminths, specialised cells called flame cells help in excretion. Taenia and Fasciola are platyhelminths whereas Ancylostoma is an aschelminth. In molluscs, mouth contains a file-like rasping organ for feeding called radula. Dentalium and Octopus are molluscs whereas Ophiura is an echinoderm. Arthropods have jointed appendages. Limulus, Apis and Laccifer all three are arthropods