NEET SECTION - A [BOTANY - MCQ]

(A)Plants are grown in controlled environment
Explanation:
Plants are grown in controlled environment

(B)cycle NADH + H⁺ back to NAD⁺.
Explanation:
The electron transport chain is a process in which the NADH and FADH₂ produced during glycolysis, beta-oxidation, and other catabolic processes are oxidised with a release of energy in the form of ATP. The main purpose of electron transport chain is to cycle NADH + H⁺ back to NAD⁺.

(A)Converts light energy into chemical energy
Explanation:
Converts light energy into chemical energy

(D)0₂
Explanation:
The small bubbles formed around the green parts of an aquatic plant in bright sunlight in the experiment performed by Jan Ingenhousz were of oxygen.

(A)Photosynthesis
Explanation:
Blackman proposed the law of limiting factors in 1905. According to this law, when a process depends on a number of factors, its rate is limited by the pace of the slowest factor. Blackman's law of limiting factors determines the rate of photosynthesis.

(B)Mesophyll
Explanation:
Mesophyll is the site in plant leaves, where chlorophyll pigment is present. Thus carbon dioxide fixation occurs there, which produces malic acid. It is then transferred to agranal chloroplast in bundle sheath.

(C)Callus
Explanation:
Callus - unspecialised, unorganised growing, undifferentiated cell & dividing the mass of cells.

(C)A - Early Prophase, B-Late Prophase, C - Metaphase
Explanation:
• Early prophase - the nuclear membrane becomes more and more indistinct and the chromatin fibers become more and more packaged and condensed.
• Late prophase - the nuclear membrane and the nucleolus finally vanishes completely.
• Metaphaseis a stage in the cell cycle where all the genetic material is condensing into chromosomes.

(A)Man and Biosphere programme
Explanation:
Man and Biosphere programme

(C)1972
Explanation:
1972

(D)Has many rare species
Explanation:
Has many rare species.

(C)culture media
Explanation:
The nutritive medium for growing bacteria and many fungi in the laboratory is called culture media.

(B)(ii) and (iv)
Explanation:
Activated sludge possesses floes of decomposer microbes, whereas, primary sludge does not possess floes. Unlike primary sludge, a lot of decomposition occurs during formation of activated sludge.

(D)In the lithosphere, hydrosphere and atmosphere
Explanation:
In the lithosphere, hydrosphere and atmosphere.

(D)Centrioles and asters
Explanation:
The centriole and Aster is not common to the mitotic cell of higher plants. The main function of the centrosome is at the time of cell division when the two centrioles separate and move on two poles. Aster and spindle are formed from it which help in the movement of chromatids. They form the basal body, cilia, flagella, etc.

(C)Psychiatry
Explanation:
The branch of medicine associated with diagnosis, prevention and cure of mental disorders is called psychiatry.

(C)(i)
Explanation:
(i)

(D)T-cells
Explanation:
T-cells

(A)Fimbriae
Explanation:
The structures that help some prokaryotic cells (bacteria) to attach to rocks and/or host tissues are Fimbriae.
Fimbriae are thin, protein tubes originating from the cytoplasmic membrane.

(A)Glycolipids and glycoproteins
Explanation:
Glycolipids and glycoproteins of plasma membrane facilitated the process of cell recognition and cell adhesion

(A)Waldeyer
Explanation:
The word chromosome was given by Waldeyer in the year 1888.

(C)Promoter, operator, regulator, repressor and structural genes
Explanation:
Promoter, operator, regulator, repressor, and structural genes

(D)TCGAAGCT
Explanation:
TCGAAGCT

(B)A-4, B-1, C-5
Explanation:
A-4, B-1, C-5

(D)Five
Explanation:
Five

(D)Cambium
Explanation:
In monocot stem vascular bundles are closed ie they lack Cambium. Thus no secondary thickening occurs.

(D)Nageli
Explanation:
The term meristem is given by C.Nageli in 1858. It was derived from Greek word meristos which means divisible.

(C)gulmohur
Explanation:
Flowers are zygomorphic in gulmohur. Flowers of gulmohur have bilateral symmetry. The other three options (Datura, mustard and tomato) have actinomorphic flowers.

(D)young anthers
Explanation:
Meiosis takes place in reproductive parts of plants such as young anthers so these can be used the stages of meiosis

(D)Both Amorphophallus and Yucca
Explanation:
Both Amorphophallus and Yucca

(C)Selaginella
Explanation:
Selaginella produces two types of spores, macro(large) and micro(small) spores, hence it is known as heterosporous.

(B)(iii), (iv) and (v)
Explanation:
(iii), (iv) and (v) are right
• The members of Phaeophyceae or brown algae are found primarily in marine habitats.
• They show great variation in size and form. They range from simple branched, filamentous forms (Ectocarpus) to profusely branched forms as represented by kelps, which may reach a height of 100 meters.
• They possess chlorophyll a, c, carotenoids, and xanthophylls.
• They vary in colour from olive green to various shades of brown.
• The colour of brown algae depends upon the amount of the xanthophyll pigment, fucoxanthin present in them.

(A)Apogeotropic
Explanation:
The coralloid roots of Cycas are apogeotropic, that is they grow upward toward the surface of the soil, instead of downward into its depths.

(B)Apophysis of capsule
Explanation:
In apophysis of capsule of moss, the guard cells and subsidiary cells originate from same mother cell.

(C)an egg cell and a male gamete.
Explanation:
The embryo develops from zygote which results from the fusion of a male gamete with the egg cell.

(D)A-Chalaza; B-Funicle; C-Micropyle; D-Integuments; E-Embryo sac; F-Nucellus
Explanation:
The given figure represents an anatropous ovule where the parts labelled from A to F are chalaza, funicle, micropyle, integuments, embryo sac, and nucellus, respectively.

(A)Insect pollinated
Explanation:
Insect pollinated

(D)All of these
Explanation:
Kingdom Plantae contains eukaryotic, multicellular autotrophs with cell wall formed of cellulose and other polysaccharides.

(C)Three
Explanation:
(iii) and (iv) are the wrong statement.
The algal component is known as phycobiont and fungal component as mycobiont, which are autotrophic and heterotrophic, respectively. Algae prepare food for fungi and fungi provide shelter and absorb mineral nutrients and water for its partner.

(C)All living organisms are made of chemicals
Explanation:
The body of all living organisms are made of a variety of chemicals. The sum total of all chemical reactions occurring in an organism due to specific interactions amongst different types of molecules within the interior of cells is called metabolism.

(B)A genus essentially possesses more than one number of species.
Explanation:
It is not essential for a genus to have several species. The genus which has single species is called monotypic, while the genus which has several species is called polytypic.

(D)Tiger - Tigris, species
Explanation:
The scientific name of the tiger is Panthera tigris where Panthera is the genus name and tigris is the species name. Hence, the correct animal name matched with its particular taxonomic category is Tiger - Tigris, the species.