Subunits of a mitochondrial ribosome in animal cells are
a) 25S and 40S b) 28S and 39S c) 30S and 40S d) 40S and 20S Answer: b) 28S and... View Article
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Which among the following is the tool used for sowing seeds that is shaped like a funnel?
a) Plough b) Hoe c) Traditional tool d) Seed drill Answer: c) Traditional tool Explanation: The traditional tool for sowing... View Article
Which of the following ribosomes are involved in protein synthesis?
a) Ribosomes which occur on the nuclear membrane and E.R b) Ribosomes of only cytosol c) Ribosomes of only nucleolus... View Article
Age of reptiles was known as
a) Mesozoic Era b) Paleozoic Era c) Cenozoic Era d) Archaeozoic Era Answer: a) Mesozoic Era Explanation: The mesozoic era... View Article
What is the epicarp and mesocarp of a coconut?
Coconut is a member of the palm tree family and belongs to the family Arecaceae. Its scientific name is Cocos... View Article
Choose the incorrect statement with respect to the cell membrane
a) Generally smaller molecules pass easily and readily than large molecules. b) Water soluble substances pass through it less readily... View Article
In a compound microscope, maximum magnification is obtained when the final image
a) Is formed at the least distance of distinct vision b) Is formed at infinity c) Coincides with the object... View Article
Which among the following statements is correct about plasmids?
a) It has a circular DNA b) It has antibiotic resistant gene c) It has the ability of autonomous replication... View Article
Draw a cross section of Aschelminthes.
Aschelminthes are free living, unsegmented worms. They are bilaterally symmetrical, triploblastic and pseudocoelomate. They are usually small, reaching upto 1... View Article
Which of the following functions is not considered a function of bile juice?
a) Neutralising the acidic traces of food b) Providing an alkaline medium for the intestinal proteases c) Emulsifying fats d)... View Article
A polygenic trait is controlled by 3 genes A,B and C. In a cross AaBbCc×AaBbCc, the phenotypic ratio of the offsprings was observed as 1:6:x:20:x:6:1 What is the possible value of x?
a) 3 b) 9 c) 15 d) 25 Answer: c) 15 Explanation: Number of offsprings= 4n Where n = number... View Article
Which of the following organisms is not responsible for ringworm?
a) Microsporum b) Trichophyton c) Macrosporum d) Epidermophyton Answer: c) Macrosporum Explanation: Different species of Microsporum, Trichophyton and Epidermophyton cause... View Article
Endosperm is completely consumed by the developing embryo in
a) Pea and groundnut b) Maize and castor c) Castor and groundnut d) Maize and pea Answer: a) Pea and... View Article
Do maize and pea have perispermic seeds?
No, maize and peas do not have perispermic seeds. Perisperm is the remnant of nucellus on the seed. Maize and... View Article
Which of the following is the natural and true product of beekeeping?
a) Propolis b) Honey c) Beeswax d) Pollen Answer: c) Beeswax Explanation: Beeswax is the natural product obtained from honeybees.... View Article
Explain the importance of sacred groves.
Sacred groves are large vegetative areas rich in biodiversity, protected by communities living around them, often harboring some religious and... View Article
The spores germinate to produce dioecious thalloid gametophyte in
a) Funaria b) Riccia c) Marchantia d) Anthoceros Answer: c) Marchantia Explanation: Marchantia is a bryophyte which gives rise to... View Article
All of the given are seral communities with respect to xerarch succession except
a) Moss b) Trees c) Lichen d) Herbs Answer: b) Trees Explanation: A seral community is a transitional stage found... View Article
Find maximum amplitude for safe SHM (block does not topple during SHM) of a uniform cubical block of side ‘a’ on a smooth horizontal floor (spring is massless) Refer the figure given:
a)mg/3K b)2mg/3K c)3mg/K d)None Solution: c) 3mg/K
The work done in joules in increasing the extension of a spring of stiffness 10 N/cm from 4 cm to 6 cm.
Solution: \(\begin{array}{l}Work done by spring =\frac{1}{2}K(x^{2}_{2}-x^{2}_{1})\end{array} \) \(\begin{array}{l}=\frac{1}{2}(1000)(0.06^{2}-0.04^{2})=1J\end{array} \)
