Biology GK Questions Quiz-3

Biology GK Questions Quiz-3

Biology Multiple Choice Questions (MCQs) Quiz for State and UPSC Civil Services Examinations. Objective Questions on Biology for competitive examinations.

    41. Anglo-Nubian is a breed of :

    (1) sheep 
    (2) goat
    (3) poultry 
    (4) cattle
    Answer:
    41. (2) The Anglo-Nubian, or simply Nubian in the United States, is a breed of domestic goat. The breed was developed in Great Britain of native milking stock and goats from the Middle East and North Africa. Its distinguishing characteristics include large, pendulous ears and a “Roman” nose. Due to their Middle-Eastern heritage, Anglo-Nubians can live in very hot climates and have a longer breeding season than other dairy goats. Considered a dairy or dual-purpose breed, Anglo-Nubians are known for the high butterfat content of their milk, although on average, the breed produces less milk than other dairy breeds.

    42. What kind of soil is treated with gypsum to make it suitable for cropping?

    (1) Alkaline
    (2) Acidic
    (3) Water-logged
    (4) Soil with excessive clay content
    Answer:
    42. (1) Alkaline soils are treated with gypsum to make it suitable for cropping. Alkaline soils are clay soils with high pH (> 9), a poor soil structure and a low infiltration capacity. Often they have a hard calcareous layer at 0.5 to 1 metre depth. Alkali soils owe their unfavorable physico-chemical properties mainly to the dominating presence of sodium carbonate which causes the soil to swell and difficult to settle. Gypsum (calcium sulphate, CaSO4. 2H2O) can also be applied as a source of Ca++ ions to replace the sodium at the exchange complex. There must be enough natural drainage to the underground, or else an artificial subsurface drainage system must be present, to permit leaching of the excess sodium by percolation of rain and/or irrigation water through the soil profile.

    43. Typhoid fever is caused by-

    (1) virus 
    (2) bacteria
    (3) fungus 
    (4) allergy
    Answer:
    43. (2) Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi.

    44. Which of the following blood group is a universal reciptient?

    (1) A 
    (2) B
    (3) AB 
    (4) O
    Answer:
    44. (3) Blood group AB individuals have both A and B antigens on the surface of their RBCs, and their blood plasma does not contain any antibodies against either A or B antigen. Therefore, an individual with type AB blood can receive blood from any group (with AB being preferable), but cannot donate blood to either A or B group. They are known as universal recipients.

    45. Rod shaped bacteria is called

    (1) Bacillus 
    (2) Spirillum
    (3) Coccus 
    (4) Coma
    Answer:
    45. (1) Bacillus is a genus of Gram-positive, rod-shaped bacteria and a member of the phylum Firmicutes. Bacillus species can be obligate aerobes or facultative anaerobes, and test positive for the enzyme catalase. Bacillus includes both free-living and pathogenic species. Under stressful environmental conditions, the cells produce oval endospores that can stay dormant for extended periods.

    46. The animal which has become extinct recently in India happens to be

    (1) Golden cat 
    (2) Cheetah
    (3) Wooly wolf 
    (4) Rhinoceros
    Answer:
    46. (2) Cheetahs have been known to exist in India for a very long time, but as a result of hunting and other causes, cheetahs have been extinct in India since the 1940s.The cheetah is the only animal that has
    been described extinct in India in the last 100 years.

    47. All the progeny obtained from a single plant by vegetative propagation are called

    (1) Clones 
    (2) Pure line
    (3) Indred line 
    (4) Pedigree line
    Answer:
    47. (1) A clone is obtained by vegetative propagation of a single plant and it propagates vegetatively in
    successive generation. It offers excitation for exploiting desirable mutations. It maintains purity of
    race in heterozygous state. The clones retains their original characteristics after many years of vegetative propagation i.e. they are stable.

    48. What is a Sponge ?

    (1) A fungus 
    (2) A fossil
    (3) A plant 
    (4) An animal
    Answer:
    48. (4) Sponges are animals of the phylum Porifera. They are multicellular organisms which have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and which often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems.

    49. Which of the following blood groups may be present in the children of a couple having blood groups A and B, respectively?

    (1) A and B only
    (2) A, B and AB
    (3) A, B, AB and O
    (4) AB only
    Answer:
    49. (3) A heterozygous woman with type A blood and a heterozygous man with type B blood have, as you figured with your Punnet square, a 25% chance with each child that the child will have blood group O, 25% chance for blood group A, 25% chance for blood group B, and 25% chance for blood group AB. The same is true for the reciprocal cross: a heterozygous woman with type B blood and a heterozygous man with type A blood. In such a family, the existence of a child with blood group O is evidence that both parents are heterozygous.

    50. Which of the following diseases is caused by a virus?

    (1) Polimyletis
    (2) Malaria
    (3) Whooping cough
    (4) Ring worm
    Answer:
    50. (1) Poliomyelitis, often called polio or infantile paralysis, is an acute, viral, infectious disease spread from person to person, primarily via the fecal-oral route. The term derives from the Greek poliós, meaning “grey”, myelós, referring to the grey matter of the spinal cord, and the suffix -itis, which denotes inflammation., i.e., inflammation of the spinal cord’s grey matter, although a severe infection can extend into the brainstem and even higher structures, resulting in polioencephalitis, producing apnea that requires mechanical assistance such as an iron lung.

    51. Which of the following is known as Vitamin B1?

    (1) Retinol 
    (2) Thiamin
    (3) Riboflavin 
    (4) Ascorbic Acid
    Answer:
    51. (2) Thiamine also called vitamin B1, named as the “thio-vitamine” (“sulfur-containing vitamin”) is a water soluble vitamin of the B complex. First named aneurin for the detrimental neurological effects if not present in the diet, it was eventually assigned the generic descriptor name vitamin B1. Its phosphate derivatives are involved in many cellular processes. The bestcharacterized form is thiamine pyrophosphate (TPP), a coenzyme in the catabolism of sugars and amino acids. Thiamine is used in the biosynthesis of the neurotransmitter acetylcholine and gammaaminobutyric acid (GABA).

    52. Which of the following is true ?

    (1) DNA is the genetic material in most of the organism
    (2) RNA is the genetic material in most viruses and bacteria
    (3) DNA is the genetic material in all the viruses
    (4) RNA is the genetic material in all the viruses
    Answer:
    52. (1) Deoxyribonucleic acid (DNA) molecules are informational molecules encoding the genetic
    instructions used in the development and functioning of all known living organisms and many viruses. DNA is one of the three major macromolecules that are essential for all known forms of life. Genetic
    information is encoded as a sequence of nucleotides (guanine, adenine, thymine, and cytosine) recorded
    using the letters G, A, T, and C. DNA is well-suited for biological information storage, since the DNA
    backbone is resistant to cleavage and the doublestranded structure provides the molecule with a builtin duplicate of the encoded information.

    53. Pathogenic bacteria secrete

    (1) Antigens 
    (2) Antibodies
    (3) Hormones 
    (4) Interferons
    Answer:
    53. (1) Pathogenic bacteria secrete various virulence factors, including toxins, lipases and proteases that
    allow them to infect, breakdown and colonize host tissue. Among various modes of action that the
    pathogenic bacteria use to damage the host, pore formation (by pore forming toxins (PFTs)) and lipid
    hydrolysis (by phospholipases) modes are common in damaging the eukaryotic cell membrane. PFTs in
    their monomeric form are extracellular diffusible and able to form hydrophilic pores in cell membrane while phospholipases cleaves and hydrolyzes the ester bonds of most phospholipids in cell membrane. Both modes of action cause uncontrolled permeation of ions and molecules across cell membrane, leading to cell death by apoptosis or necrosis. The attenuated pathogenic bacteria are engineered to secrete the antigen into the periplasmic space of the bacteria or into the environment surrounding the bacteria.

    54. Where is the Botanical Survey of India headquartered ?

    (1) Lucknow 
    (2) Darjeeling
    (3) Kolkata 
    (4) Oottaccamund
    Answer:
    54. (3) The Botanical Survey of India (BSI) is the apex research organization under the Ministry of
    Environment and Forests, Govt. of India for carrying out taxonomic and floristic studies on wild plant
    resources of the country. It was established on 13th February, 1890 with the basic objective to explore
    the plant resources of the country and to identify the plants species with economic virtues. The Botanical Survey of India has the nine regional circles situated at different regions of the country.

    55. Who amongst the following was awarded Nobel Prize for path breaking contributions to develop treatment against Parkinson's disease ?

    (1) Arvid Carlsson
    (2) Walter Kohn
    (3) Robert B. Laughlin
    (4) Ferid Murad
    Answer:
    55. (1) In the 1950s, Arvid Carlsson demonstrated that dopamine was a neurotransmitter in the brain and not just a precursor fornorepinephrine, as had been previously believed. He developed a method for
    measuring the amount of dopamine in brain tissues and found that dopamine levels in the basal ganglia,
    a brain area important for movement, were particularly high. He then showed that giving animals the drug reserpine caused a decrease in dopamine levels and a loss of movement control. These effects
    were similar to the symptoms of Parkinson’s disease. Arvid Carlsson subsequently won the Nobel Prize in Physiology or Medicine in 2000.

    56. Which of the following food items is rich in iron ?

    (1) Rice 
    (2) Apple
    (3) Pulses 
    (4) Orange
    Answer:
    56. (2) Apples are a great, healthy food, but even with the skin they do not contain a large amount of iron. Apples contain 11 milligrams of iron per 100 grams. A gram is a measure of weight. Fruit as a food group is not a great iron source but it does play an important role in our ability to absorb iron. Fruit is often loaded with vitamin C, a vitamin that will actually help to utilize the iron in vegetarian foods; apples are a modest source of vitamin C.

    57. Who discovered Cholera germs?

    (1) Robert Koch
    (2) Rene Laennec
    (3) Dreser
    (4) Hansen
    Answer:
    57. (1) In 1883, Koch worked with a French research team in Alexandria, Egypt, studying cholera. Koch identified the vibrio bacterium that caused cholera.

    58. Sweetex used by the diabetic patients has energy content of :

    (1) Five calories
    (2) Ten calories
    (3) Hundred calories
    (4) Zero calories
    Answer:
    58. (4) Low-calorie sweeteners are sugar substitutes that have zero calories and do not raise blood glucose levels through eating them, which makes them a preferable choice for diabetic people over sugar.

    59. The element which is the most abundant in the human body is:

    (1) Oxygen 
    (2) Carbon
    (3) Iron 
    (4) Nitrogen
    Answer:
    59. (1) The generation and maintenance of all our life processes are supported by four basic components: carbohydrates, water, proteins and energy. Most scientists agree that oxygen is actually the over-riding key ingredient in all four of these life components. 80% of all our metabolic energy production is created by oxygen! The human body is largely composed of oxygen. All metabolic processes in the body are regulated by oxygen.

    60. Oxygen liberated during photosynthesis is coming from :

    (1) Carbon dioxide
    (2) Water
    (3) Bresk down of chlorophy II
    (4) Atmosphere
    Answer:
    60. (2) Oxygen liberated during photosynthesis is coming m6to create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin.

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