Subject

Biology

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

 Multiple Choice QuestionsMultiple Choice Questions

1.

In the five-kingdom classification, Chlamydomonas and Chlorella have been included in

  • Protista

  • Algae

  • Plantae

  • Plantae


A.

Protista

RH Whittaker (1969) divided all living organisms into five kingdoms namely Monera, Protista, Fungi, Plantae and Animalia.

Monera Prokaryotic Organisms
Protista Unicellular eukaryotes including diatoms Euglenophyta and Pyrophyta
Plantae Multicellular plants including Chlorophyceae (Chlamydomonas and Chlorella) Phaeophyceae of algae
1874 Views

2.

Which one of the following pairs is wrongly matched?

  • Ginkgo – Archegonia

  • Salvinia – Prothallus

  • Viroids – RNA

  • Viroids – RNA


B.

Salvinia – Prothallus

Salvinia is a heterosporoues water fern. The microsporangia and megasporangia are borne within special reproductive structure called sporocarps. These are borne terminally in clusters on the segment of submerged leaves. Sporocarps are strictly monosporangiate, i.e., they bear either only microsporangia or megasporangia.
Viroids are single stranded RNA molecules. The female reproductive organ is archegonia in gymnosperms.

961 Views

3.

Read the following four statements:
I. Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.
II. In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth.
III. Stamens in flowers of Gloriosa and Petunia are polyandrous.
IV. Symbiotic nitrogen fixers occurs in free-living state also in soil. 

How many of the above statements are right 

  • Two

  • Three

  • Four

  • Four


A.

Two

Symbiotic nitrogen-fixing bacteria and Cyanobacteria are found in association to plant. The most common symbiotic bacteria is Rhizobium.
In dicot stem, the cambium present between xylem and phloem in vascular bundles is called fascicular or intrafascicular cambium. Besides this some cells of medullary rays also become meristematic and called interfascicular cambium.

1765 Views

4.

Read the following five statements and answer as asked to them
I. In Equisetum the female gametophyte is retained on the parent sporophyte.
II. In Ginkgo male gametophyte is not independent.
III. The sporophyte in Riccia is more developed than that in Polytrichum.
IV.  Sexual reproduction in Volvox is isogamous.
V. The spores of the above statements are correct?

  • Two

  • Three

  • Four

  • Four


D.

Four

The spore of Equisetum germinate shortly after shedding and give rise to form prothallus. Prothalli of Equisetum are basically monoecious and the gametophytes are rarely seen.
The simplest known sporophyte among bryophytes is that of Riccia while highest evolved known is Bryopsida (Polytrichum, Pogonatum).
Sexual reproduction in Volvox is oogamous type.
The spores in slime molds (e.g., Physarum) are haploid, unicellular usually globose with smooth, spiny or reticulately thickened cell walls.

911 Views

5.

How many organisms in the list given below are autotrophs?
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Walfia.

  • Four

  • Five

  • Six

  • Six


C.

Six

Autotrophs are organisms which are capable of synthesizing their food themselves from organic and inorganic substances.

Mode of Nutrition Organism
Chemosynthetic
autotroph
Saprophytic heterotroph
Nitrosomonas and Nitrobacter Lactobacillus Saccharomyces
Trypanosoma
Parasitic Trypanosoma





Photosynthetic autotrophic

Nostoc, Chara, Porphyra and Wolffia 
3602 Views

6.

Which one of the following structures is an organelle within an organelle?

  • Ribosome

  • Peroxisome

  • ER

  • ER


A.

Ribosome

Ribosomes are smallest known electron microscopic ribonucleoprotein particles attached either to endoplasmic reticulum, floating free in cytoplasm and also found in mitochondria and chloroplast (these are called organeller ribosomes). These are site of protein synthesis.

1190 Views

7.

Which one of the following organisms is correctly matched with its three characteristics?

  • Pea: C3 pathway, Endospermic seed, Vexillary aestivation

  • Tomato: Twisted aestivation, Axile placentation, Berry

  • Onion: Bulb, Imbricate aestivation, Axile placentation

  • Onion: Bulb, Imbricate aestivation, Axile placentation


B.

Tomato: Twisted aestivation, Axile placentation, Berry

Pea-C3-pathway, non-endospermic seed, vexillary aestivation. 
Tomato-Twisted aestivation, axile placentation, berry fruit. 
Maize -C4- pathway, closed vascular bundle.
Onion-Bulb, axile placentation, perianth.

894 Views

8.

How many plants in the list given below have marginal placentation?
Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin

  • Four

  • Five

  • Six

  • Six


C.

Six

Placentation Example
Axile Tomato, onion, Asparagus, tobacco, chilli, tulip, colchicine
Parietal Mustard
Marginal Gram, arhar, moong, pea, lupin, sunhemp
2465 Views

9.

For its activity, carboxypeptidase requires

  • Zinc

  • Iron

  • Niacin

  • Niacin


A.

Zinc

Carboxypeptidase is synthesized and secreted by the exocrine cells of pancreas. Zn2+ is required for the activity of carboxypeptidase, carbonic anhydrase and alcohol dehydrogenase.

759 Views

10.

Through their effect on plant growth regulators, what do the temperature and light control in the plants?

  • Apical dominance

  • Flowering

  • Closure of stomata

  • Closure of stomata


B.

Flowering

There are three factors which govern the flowering in angiosperms. These factors are completion of juvenile phase and attaintment of mature or adult phase, suitable light and proper temperature. 

863 Views