Recent questions in Biology

Emergency contraceptives include:

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Regarding Oral pills:

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The hormone releasing IUDs, in addition to other IUDs

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The hormone releasing IUDs:

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Choose the odd one out:

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Intra Uterine Devices (IUDs): (i) are inserted by doctors or expert nurses in the uterus through ****** (ii) ideal contraceptives for the females who want to delay pregnancy and/or space children Regarding (i) and (ii):

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Based on the anatomical site of use choose the odd one out:

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An ideal contraceptive should be:

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Our population which was approximately 350 million at the time of our independence reached close to the billion mark by 2000 and crossed 1 billion in May 2000; this is due to a :

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‘Saheli’:– (i) a new oral contraceptive for the females (ii) it was developed by scientists at Central Drug Research Institute (CDRI) in Lucknow, India Regarding (i) and (ii):

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Regarding Amniocentesis all are correct except:

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Improved programmes covering wider reproduction-related areas are currently in operation under

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1. India was amongst the first countries in the world to initiate action plans and programmes at a national level to attain total reproductive health as a social goal. 2. These programmes called ‘family planning’ were initiated in 1951. Regarding 1 and 2:

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According to the World Health Organisation (WHO), reproductive health means

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Mycoplasma is placed in

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Mycoplasma: Assertion (A): Mycoplasma can pass through bacterial filters Reason (R): Due to their plasticity Regarding (A) and (R):

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In Mycoplasma the cells are bounded by :

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The fimbriae are :

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The pili are :

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Choose the odd one out - regarding surface structures of the bacteria and their role in motility. :

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Choose the odd one out - regarding surface structures of the bacteria :

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Bacterial flagellum is composed of –

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Motile bacteria, they have thin filamentous extensions from their cell wall known as :

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1. Bacterial cells may be motile 2. Bacterial cells may be non-motile. Regarding 1 and 2 :

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In some prokaryotes : 1. There are membranous extensions into the cytoplasm called chromatophores 2. Chromatophores contain pigments. Regarding 1 and 2 :

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Mesosome help in respiration, secretion processes, to :

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Mesosome help in :

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Mesosome help in :

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Mesosome is formed by extensions of plasma membrane into the cell in the form of :

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The plasma membrane is :

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The cell wall :

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Gram stain : 1. Those that take up the gram stain are Gram positive 2. Those that do not are called Gram negative bacteria Regarding 1 and 2 :

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Bacteria can be classified into two groups - Gram positive and Gram negative on the basis of :

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Regarding prokaryotes and eukaryotes choose the incorrect option:

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Regarding plasmid DNA choose the incorrect option:

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Membrane bound organelles are absent in

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Choose the odd one out :

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1. Cells of bacteria could be 30 to 50 μm in length. 2. The largest isolated single cell is the egg of an ostrich. Regarding 1 and 2 :

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$Na^+/k^+$ Pump is

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1. Animal and plant cells contain non-membrane bound organelle called centriole 2. Centriole helps in cell division. Regarding 1 and 2 :

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The prokaryotic cells have

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1. The eukaryotic cells have other membrane bound distinct structures called organelles. 2. The prokaryotic cells lack membrane bound organelles. Regarding 1 and 2 :

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1. The cytoplasm is the main arena of cellular activities in both the plant and animal cells. 2. Various chemical reactions occur in it to keep the cell in the ‘living state’. Regarding 1 and 2 :

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In both prokaryotic and eukaryotic cells, A semi-fluid matrix, cytoplasm occupies the volume of the cell in :

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1. Cells that have membrane bound nuclei are called eukaryotic 2. Cells that lack a membrane bound nucleus are called prokaryotic. Regarding 1 and 2 :

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Omnis cellula-e cellula means :

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Cell theory : 1. All living organisms are composed of cells and products of cells. 2. All cells arise from pre-existing cells.

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1. Schleiden and Schwann together formulated the cell theory. 2. This theory explains how new cells were formed from prexisting cells.

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1. Anton Von Leeuwenhoek first saw and described a live cell. 2. Robert Brown later discovered the nucleus. Regarding 1 and 2 :

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Regarding Cell : Assertion (A): Cell is the fundamental structural and functional unit of all living organisms. Reason (R): Anything less than a complete structure of a cell does not ensure independent living. Regarding (A) and (R) :

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