General Science Questions (MCQs) for Competitive Examinations
General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App
31. Where does glucose breaks down into pyruvate?
[A] Golgi bodies
[B] Cytoplasm
[C] Protoplasm
[D] Chloroplast
Show Answer
Correct Answer: B [Cytoplasm]
Notes:
During glycolysis, glucose is broken down in ten steps to two molecules of pyruvate in cytoplasm (in the cellular matrix called cytosol). It then enters the mitochondria where it is oxidised through the tricarboxylic acid cycle to carbon dioxide and water.
32. ___ is that branch of Biology which deals with organisms structure and its organs:
[A] Anatomy
[B] Ecology
[C] Mycology
[D] Chronobiology
Show Answer
Correct Answer: A [Anatomy]
Notes:
Anatomy, a field in the biological sciences concerned with the identification and description of the body structures of living things. Gross anatomy involves the study of major body structures by dissection and observation and in its narrowest sense is concerned only with the human body.
33. Which of the following is used for wrapping of fractured bones?
[A] Zinc oxide
[B] Plaster of Paris
[C] White cement
[D] White lead
Show Answer
Correct Answer: B [Plaster of Paris]
Notes:
Plaster of Paris is a plaster made by calcining gypsum.
CaSO4•1/2?H2?O.
It can be used to impregnate gauze bandages to make a sculpting material called modroc. It is used to make classic plaster orthopedic casts to protect limbs with broken bones.
34. Cancer treatment is done by which of the following noble gas?
[A] Krypton
[B] Helium
[C] Radon
[D] Neon
Show Answer
Correct Answer: C [Radon]
Notes:
Radon is used in radiotherapy for cancer treatment. Radon is the heaviest known gas, is radioactive and is essentially inert. At ordinary temperatures, radon is a colorless gas, but when it is cooled below its freezing point it gains stunning phosphorescence. One problem with radiation therapy is that it often kills healthy tissue alongside cancerous tissue.
35. Which of the following part Human respiratory system provide space for exchange of gases?
[A] Bronchi
[B] Trachea
[C] Bronchioles
[D] Alveoli
Show Answer
Correct Answer: D [Alveoli]
Notes:
Alveoli are an important part of the respiratory system whose function it is to exchange oxygen and carbon dioxide molecules to and from the bloodstream. These tiny, balloon-shaped air sacs sit at the very end of the respiratory tree and are arranged in clusters throughout the lungs. Alveoli are tiny balloon shaped structures and are the smallest passageway in the respiratory system.
36. The smallest known prokaryotic organism is _____:
[A] Bacteria
[B] Microcystis
[C] Mycoplasma
[D] Chlorella
Show Answer
Correct Answer: C [Mycoplasma]
Notes:
Mycoplasmas are the smallest and simplest prokaryotes capable of self-replication. Keeping the number of structural elements, metabolic pathways and components of the protein synthesizing machinery to an essential minimum places Mycoplasmas closest to the concept of ‘minimum cells’.
37. Bulbils takes part in ____:
[A] Respiration
[B] Sexual reproduction
[C] Food storage
[D] Vegetative reproduction
Show Answer
Correct Answer: D [Vegetative reproduction]
Notes:
Bulbil is a small bulblike organ of vegetative reproduction growing in leaf axils or on flower stalks of plants such as the onion and tiger lily. It is a reproductive organ that takes part in vegetative reproduction. The bulbils drop from the parent plant on to the ground, give out adventitious roots and develop into new plants. The other structures involved in vegetative propagation include rhizome, bulb, corm, cuttings, etc.
38. Cod is a variety of _____:
[A] Fish
[B] Crop
[C] Coral
[D] Goat
Show Answer
Correct Answer: A [Fish]
Notes:
Cod is the common name for the genus Gadus of demersal fishes, belonging to the family Gadidae. Cod is also used as part of the commons name for a number of other fishes, and there are species suggested to belong to genus Gadus that are not called cod (the Alaska pollock). Cod is popular as a food with a mild flavour and a dense, flaky white flesh. Cod livers are processed to make cod liver oil, an important source of vitamin A, vitamin D, vitamin E and omega-3 fatty acids (EPA and DHA).
39. Afla toxins are produced by
____:
[A] Bacteria
[B] Fungi
[C] Algae
[D] Viruses
Show Answer
Correct Answer: B [Fungi]
Notes:
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
40. Which of the following disease is caused by bacteria?
[A] Dengue fever
[B] AIDS
[C] Tuberculosis
[D] Common cold
Show Answer
Correct Answer: C [Tuberculosis]
Notes:
Tuberculosis (TB) is an infectious disease of the lungs. It is typically caused by bacteria called Mycobacterium tuberculosis. The common cold is a viral infectious disease of the upper respiratory tract that primarily affects the nose. AIDS (acquired immunodeficiency syndrome) is a syndrome caused by a virus called HIV (human immunodeficiency virus). Dengue fever is a mosquito-borne tropical disease caused by the dengue virus.