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Biosciences – Botany and Zoology Study Material बिभाग “च”

Biosciences – Botany and Zoology Study Material बिभाग “च” Shared By Promodh Shirke

Biosciences – Botany and Zoology Study Material बिभाग “च” on mahasarkar.co.in. This is the page where we are deal with Biosciences – Botany and Zoology Study Material For Maharashtra Recruitment Exam. Every questions come from various source i.e. Study of life; cell-the basic unit of life; Classificaton of Living organisams; Organization of Living Body; Nutrition; Respiration; The Transport System; Excretion Metabolic wastes; Biocommunication; Muscle Movement Etc. यह पेज ओह सब स्टूडेंट के लिए है, जो नौकरी की तलाश में हैं और भारती परिक्षा दिने के लिए इच्छुक हैं।

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Biosciences – Botany and Zoology Study Material बिभाग “च”

  1. A meristem is a plant tissue primarily concerned with

(1) Formation of new cells

(2) Giving strength to the plant body

(3) Secretion

(4) Transport of water and minerals

Ans:- (1) Formation of new cells

  1. Commercial cork is obtained and from the bark of

(1) Elm

(2) Maple

(3) Oak

(4) Willow

Ans:- (3) Oak

  1. Epidermis, the outermost layer of a leaf, is perforated by small pores for gaseous exchange. These pores are called

(1) Hydathodes

(2) Stigmata

(3) Stomata

(4) Stroma

Ans:- (3) Stomata

  1. A plant bearing both male and female flowers is called

(1) Bisexual

(2) Dioecious

(3) Monoecious

(4) Monogamous

Ans:- (3) Monoecious

  1. Bacteria can remain alive at subzero temperatures for

(1) A few weeks

(2) a few years

(3) up to 100 years

(4) More than 1000 years

Ans:- (4) More than 1000 years

  1. A gram of fertile garden soil may contain bacteria up to

(1) 1 million

(2) 100 million

(3) 500 million

(4) 1 billion and above

Ans:- (4) 1 billion and above

  1. A pure culture of bacteria was first obtained by

(1) Anton van Leeuwenhoek

(2) Edward Kenner

(3) Louis Pasteur

(4) Robert Koch

Ans:- (4) Robert Koch

  1. Which of the following plant disease is caused by bacteria?

(1) Citrus dieback

(2) Karnal bunt of wheat

(3) Potato witches broom

(4) Tundu disease of wheat

Ans:- (4) Tundu disease of wheat

  1. The Ames test refers to a rest

(1) Performed on bacteria to determine the carcinogenicity of chemicals

(2) Performed on laboratory animals to determine the carcinogenicity of chemicals

(3) To determine the pathogen city of a bacterium

(4) To determine the effectivess of an antibiotic

Ans:- (1) Performed on bacteria to determine the carcinogenicity of chemicals

  1. The term ‘gene’ for the factors controlling heredity was coined by

(1) Gregor Mendel

(2) Hugo de Vries

(3) TH Morgan

(4) E Johannsen

Ans:- (4) E Johannsen

  1. There are 23 pairs of chromosomes in man. How many types of eggs can a woman produce supposing that is heterozygous for each of her 23 pairs of chromosomes?

(1) 23

(2) 46

(3) 2.3 million

(4) 8.4 million

Ans:- (4) 8.4 million

  1. The ‘one gene-one enzyme’ hypothesis suggesting that one gene controls the synthesis of one enzyme was proposed by

(1) Beadle and Tatum]

(2) Jacob and Monod

(3) Hargobind Khorana

(4) Arthur Kornberg

Ans:- (1) Beadle and Tatum

  1. W.M. Stanley was awarded the Nobel Prize for being the first scientist to obtain a virus in pure crystalline form. The virus was

(1) Cauliflower mosaic was

(2) Polio virus

(3) rabies virus

(4) Tobacco mosaic virus

Ans:- (4) Tobacco mosaic virus

  1. Mycorrhiza is a symbiotic association between plant roots and

(1) Bacteria

(2) Blue-green algae

(3) Fungi

(4) Nematodes

Ans:- (3) Fungi

  1. It has been demonstrated that even mature plant cells, when freed from others, are able to develop into new plants. This phenomenon is called

(1) Apogamy

(2) Parthenogenesis

(3) Somatogenesis

(4) Totipotency

Ans:- (4) Totipotency

  1. Wheat, barley, lemon, orange, ray, and pearl millet belong to

(1) Two plant families

(2) Three plant families

(3) Four plant families

(4) The same plant family

Ans:- (1) Two plant families

  1. For a cell to drive, it is essential that its DNA is replicated so that each daughter cell gets an identical DNA. This replication occurs during

(1) Prophase

(2) Metaphase

(3) Telophase

(4) Interphase

Ans:- (4) Interphase

  1. The following scientists won Noble Prize for their contributions to science. Who among them won it twice?

(1) Barbara McClintock

(2) Frederick Sanger

(3) Melvin Calvin

(4) Otto Warburg

Ans:- (2) Frederick Sanger

  1. The photosynthetic activity of plants sustains all life on earth, including man. Who among the following scientists won a Nobel Prize for his contribution in this field?

(1) Hans A. Kerbs

(2) Linus Pauling

(3) Melvin Calvin

(4) Peter Mitchell

Ans:- (3) Melvin Calvin

  1. Tomato, brinjal, potato, tobacco, petunia, and night jasmine belong to

(1) The same plant family

(2) Two plant families

(3) Three plant families

(4) Five plant families

Ans:- (1) The same plant family

  1. Opium is a plant product obtained from

(1) Dried leaves

(2) Dried latex

(3) Roots

(4) Stem bark

Ans:- (2) Dried latex

  1. A tissue primarily concerned with the formation of new cells is called

(1) Chlorenchyma

(2) Parenchyma

(3) Sclerenchyma

(4) Meristem

Ans:- (4) Meristem

  1. Sucrose content in sugarcane decreases

(1) If high rainfall occurs during the period of growth of the plant

(2) If frost occurs during the period of ripening

(3) If there is fluctuation in temperature during the period of growth of the plant

(4) If there is high temperature during the time of ripening

Ans:- (4) If there is high temperature during the time of ripening

  1. Fertile soil, suitable for growing common crops, is likely to have a pH value of

(1) Three

(2) Four

(3) Six to seven

(4) Nine to ten

Ans:- (3) Six to seven

  1. The pairing of homologous chromosomes during prophase I of meiosis is called

(1) Crossing over

(2) Syngamy

(3) Synapsis

(4) Syngenesis

Ans:- (3) Synapsis

  1. If a mouse over eight times its normal size has been produced by introducing human growth hormone gene, the technique involved is called

(1) Hybridization

(2) Genetic engineering

(3) Mutation breeding

(4) Hormonal feeding

Ans:- (2) Genetic engineering

  1. Which one of the following approaches comes under the category of biotechnology?

(1) Use of living organisms or substances obtained from them in industrial processes

(2) Modernizing the commercial industries to produce products for use in biological research

(3) Use of modern technology to investigate biological disorders

(4) Use of industrial technology to increase the biosphere

Ans:- (1) Use of living organisms or substances obtained from them in industrial processes

  1. Haemophilia is a hereditary disease carried by

(1) Females and expressed by females

(2) Females and expressed by males

(3) Males and expressed by females

(4) Males and expressed by males

Ans:- (2) Females and expressed by males

  1. Which one of the following strongly threatens biodiversity?

(1) Fragile ecosystems such as mangroves and wetlands

(2) Inaccessible habitats in the Himalayas

(3) Destruction of natural habitats and vegetation and shifting cultivation

(4)  Creation of biosphere reserves

Ans:- (3) Destruction of natural habitats and vegetation and shifting cultivation

 

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