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Out of proteins, lipids and carbohydrates present in a cell membrane, what is true?
Carbohydrates are minimum
Of the following taxonomic categories which is the most inclusive (i.e. is the highest in hierarchy)?
Class
Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to
gymnosperms
Which statement regarding the mammalian heart is correct?
In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs
Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by
Robert Brown
One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?
You are infected by a virus
Plant bends towards the source of light on account of the movement of curvature known as
phototropism
Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?
The flow of solution is not possible through semi permeable membrane
Photosynthesis generally takes place in which parts of the plant?
Leaf and other chloroplast bearing parts
The study of structures of organisms, their cells and their organelles at molecular level is known as
Cell biology
Our skin, when exposed to excess sunlight, becomes dark. This is because of our skin pigments called
melanin
It is a heredity material and contains the genetic information which is passed on from one generation to another.
DNA
Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with
only conifers
Most fish do not sink in water because of the presence of:
I. swim bladder
II. air bladder
III. air sacs
IV. air in spongy bones
I. swim bladder
II. air bladder
III. air sacs
IV. air in spongy bones
I and II are correct
One of the following is not a function of bones.
Secretion of hormones for calcium regulation in blood and bones
Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?
By denitrification
An individual whose blood type is B may in an emergency, donate blood to a person whose blood type is
AB or B
Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes
cholera