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Cell - The Unit of Life Test - 4

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Cell - The Unit of Life Test - 4
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  • Question 1
    4 / -1

    Animal cell do not possess

    Solution

    Animal cell do not possess plasmodesmata but it contain ribosomes, centriole andplamalemma. Plasmodesmata is the connection between two plant cells.

  • Question 2
    4 / -1

    Lipid molecules of plasma membrane occur

    Solution

    The lipid molecules of plasma membrane occurs parallel to each other in plasma membrane of the cell.

  • Question 3
    4 / -1

    How much percent of vacuoles occupy the volume of the cell in plant cells?

    Solution

    In plant cells the vacuoles can occupy up to 90 per cent of the volume of the cell.

  • Question 4
    4 / -1

    Select the incorrect matching

    Solution

    The nucleus contains the chromosomes which in turn contain the genetic material, DNA.

  • Question 5
    4 / -1

    Two cell organelles in plant cell having own genetic material is called

    Solution

    Mitochondria and chloroplast contain theirown genetic material. Genetic material is mainly present in nucleus of the cell but these two cell organelles also contain own genetic material.

  • Question 6
    4 / -1

    The ability of a living somatic nucleated cell to form the complete organism is called

    Solution

    The ability of a living somatic nucleated cell to form the complete organism is called cellular totipotancy. Cellular totipotancy is present in plant cells.

  • Question 7
    4 / -1

    The plasma membrane consists mainly of

    Solution

    The plasma membrane is composed of lipids that are arranged in a bilayer. Also, the lipids are arranged within the membrane with the polar head towards the outer sides and the hydrophobic tails towards the inner part. The membrane proteins can be classified as integral or peripheral. Peripheral proteins lie on the surface

  • Question 8
    4 / -1

    Chlorophyll is located inside

    Solution

    The chloroplast consists of a number of organised flattened membranous sacs called the thylakoids,Chlorophyll pigments are present in the thylakoids.

  • Question 9
    4 / -1

    The stacks of closely packed thylakoids is called

    Solution

    The stacks or closely packed thylakoids is called granum. Chlorophyll is present inside the thylakoidsto perform photosynthesis in plant cells.

  • Question 10
    4 / -1

    Longest cell in human body are

    Solution

    Nerve cell or neuron is the longest cell in human body. They are responsible for transferof information from one part of the body to the other in form of nerve impulses.

  • Question 11
    4 / -1

    The most recent and accepted model of plasma membrane is

    Solution

    Fluid-Mosaic model is the most recent and accepted model of plasma membrane. This model was proposed by Singer and Nicolson in 1972. The quasi-fluid nature of lipid enables lateral movement of proteinswhithin the overall bilayer.

  • Question 12
    4 / -1

    The nucleus was first described by

    Solution

    Nucleus as a cell organelle was first described by Robert Brown as early as 1831.

  • Question 13
    4 / -1

    Which one is present nearest to plasmamembrane?

    Solution

    The cell wall of a young plant cell, the primary wallis capable of growth, which gradually diminishes as the cell matures and the secondary wall is formed on the inner (towards membrane) side of the cell.

  • Question 14
    4 / -1

    Which one is not a difference between Prokaryotic and Eukaryotic cell?

    Solution

    Most prokaryotic cells, particularly the bacterial cells, have a chemically complex cell envelope. All eukaryotic cells are not identical. Plant and animal cells are different as the former possess cell walls.

  • Question 15
    4 / -1

    Smallest free living organism are

    Solution

    PleuroPneumonia Like Organisms (PPLOs) are considered as smallest free living organism. It do not contain cell membrane or cell wall and present as fluid. It causes disease in plants.

  • Question 16
    4 / -1

    Each centriole is surrounded by dense amorphous protoplasmic masses called

    Solution

    All animal cell have two small organelles called centrioles. Each centriole is surrounded by dense amorphous protoplasmic masses called Massules.

  • Question 17
    4 / -1

    Lysosomes are produced by

    Solution

    These are membrane bound vesicular structures formed by the process of packaging in the Golgi apparatus.

  • Question 18
    4 / -1

    Cytoskeleton is made of

    Solution

    An elaborate network of filamentous proteinaceous structures present inthe cytoplasm is collectively referred to as the cytoskeleton.

  • Question 19
    4 / -1

    The structure of plasma membrane fluid mosaic model is proposed by

    Solution

    An improved model of the structure of cell membrane was proposed by Singer and Nicolson (1972) widely accepted as fluidmosaic mosaic model.

  • Question 20
    4 / -1

    The fluid filled vacuoles or vesicles which are separated from cytoplasm by a selectively permeable membrane called

    Solution

    Tonoplasts are the fluid filled vacuoles or vesicles which are separatedfrom cytoplasm by a selectively permeable membrane. It help in maintaining turgidity of the cell.

  • Question 21
    4 / -1

    The photograph or diagram of metaphasicchromosome arranged in homologous pair according to their length and thickness, position of centromere is called

    Solution

    Ideogram is a photograph or diagram of metaphases chromosomes of an organism arranged in homologous pair according to their length, thickness and position of centromere, length of arm, shape and other characteristics. The sex chromosomes are usually placed at the end.

  • Question 22
    4 / -1

    The eukaryotic ribosomes are of

    Solution

    The eukaryotic ribosomes are 80S while the prokaryotic ribosomes are 70S. Here ‘S’ stands for the sedimentation coefficient; it indirectly is a measure of density and size.

  • Question 23
    4 / -1

    The process of movement of few ions or molecules across the membrane against a concentration gradient from lower to higher  concentration, it is called

    Solution

    Active transport is the movement of molecules or ions against a concentration gradient (from an area of lower to higher concentration), which does not ordinarily occur, so enzymes and energy are required.

  • Question 24
    4 / -1

    Proteins synthesized by ribosomes on the endoplasmic reticulum are modified in

    Solution

    The number of proteins synthesised by ribosomes on the endoplasmic reticulum are modified in the cisternae of the golgiapparatus .

  • Question 25
    4 / -1

    Which one is present nearest to plasmamembrane?

    Solution

    Secondary wall is formed inside the primary wall. Secondary wall is present nearest to plasma membrane of plant cell.

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