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General Science MCQ Practice
Practice General Science questions with instant scoring, correct answer highlighting, detailed solutions and first-click AI explanation caching for missing explanations.
📚 Questions: 553
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Q. 4232
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The Law of Segregation and The Law of Independent Assortment were discovered by
The correct answer is A: Johann Gregor Mendel.
- Key concept: Mendel’s laws of heredity—Law of Segregation (alleles separate during gamete formation) and Law of Independent Assortment (genes on different chromosomes assort independently).
- Reason: Based on his controlled cross-breeding experiments with pea plants and observation of trait inheritance patterns.
- Formula/logic: For a heterozygous genotype Aa, gametes carry A or a with equal probability (½ each) under Law of Segregation; independent assortment implies combinations like Aa Bb occur in 4 possible gamete/zygosity outcomes.
- Exam tip: Remember Mendel’s pea experiments as the foundation of classical genetics.
- Other options are wrong because Morgan studied sex-linked genes and linkage; Govindjee and Hatch did not formulate these laws.
Q. 4231
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Thorium and Beryllium are
Atomic minerals include mainly minerals containing
uranium, thorium, rare metals, viz. niobium, tantalum, lithium, beryllium, titanium, zirconium, and rare earth elements (REEs) containing uranium and thorium as well as beach sand minerals.
Q. 4230
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Down syndrome is a/an
A genetic condition caused by having an extra chromosome 21 in some or all of the body's cells.
Q. 4229
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In plants, meiotic cell division takes place in
the:
Meiosis is a type of cell division in which the number of chromosomes is halved (from diploid to haploid) in the daughter cells, i.e., the gametes. In plant it takes place in Flower.
Q. 4227
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Study of, and the selection, planting, care, and removal of individual trees, shrubs, vines, and
other perennial woody plants is known as
Arboriculture is the art of cultivating, properly managing, and studying individual shrubs, trees, vines, and any other woody plants.
Q. 4226
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In plants, extra-chromosomal DNA is found in
In many cases, extrachromosomal DNA is contained in cytoplasmic organelles, such as mitochondria (animals), and in chloroplasts and plastids (plants).
Q. 4225
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The fruit of banana is botanically a
A banana is an elongated, edible fruit, botanically a berry, produced by several kinds of large herbaceous flowering plants in the genus Musa.
Q. 4224
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In a forest ecosystem, green plants are
The green plant in the ecosystem are called producers. In a terrestrial ecosystem, major producers are herbaceous and woody plants. Likewise,
producers in an aquatic ecosystem are various species like phytoplankton, algae and higher plants.
Q. 4222
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Which of the following is a ripening hormone?
Ethylene is used for the controlled ripening of citrus fruits, tomatoes, bananas and many other fruits, vegetables and flowers.
Q. 4197
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"ELISA" test is employed to diagnose:
The assay used most widely to detect or diagnose virus infection, especially infection of blood borne viruses e.g. HBV, HCV, HIV and HTLV, is the enzyme linked immunosorbent assay (ELISA).
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