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    bio-obj
    1ABDBCDCBBD
    11CDBDCBBABA
    21CBCCDBCDDC
    31CBAADCCABA
    41CABADDDBDC

     

    Section B Answer 3 Only

    ================================

    2a)
    i)They catalyse reactions by lowering the activation energy of a reaction
    ii)They are regenerated after each reaction
    iii)They are substrate specific, hence only molecules which are complementary to their shape can bind to it.
    iv)They aid in metabolism(anabolism and catabolism)

    2bi)
    -Pancreatic lipase
    -Amylase

    2bii)
    i)maltae act
    ii)lipase act

    2bii)
    i)it converts fat and oil to fatty acids and glycerol
    ii)it converts starch to maltose

    2ci)
    Chlorophyll is necessary to absorb the radiant energy of the sun to synthesize sugar during photosynthesis

    2cii)
    i)Magnessium
    ii)Iron

    2ciii)
    i)Magnessium —}Yellowing of leaves and poor growth
    ii)Iron—}Yellowing of leaves and poor growth

    ++++++++++++++++++++
    1ai)
    Classification of living things is the way in which all living things are placed into larger and larger groups or catetories that share similarities and a common ancestry.

    1aii)
    Carl Linnaeus

    1aiii)
    i)It allows scientists to identify, group, and properly name organisms via a standardized system
    ii)to make it easier to study and understand their behaviors,
    iii)To study evolutionary progression of millions of life forms

    1aiv)
    i)Kingdoms
    ii)Phylum
    iii)Classes
    iv)Order
    v)Families
    vi)Genus
    vii)Species
    1bi)
    i)they can reproduce
    ii)they can mutate

    1bii)
    i)they do not carry out metabolism on their own hence they do not grow
    ii)they contain no cytoplasm or cellular organelles

    1ci)
    i)mosaic disease of cassava
    ii)swollen shoot disease of cocoa

    1cii)
    i)human immunodeficiency virus (HIV)
    ii)measles

    +++++++++++++++++++++++++

    6a)
    The odorous molecules come into contact with the olfactory epithelium at the top of the nasal cavity and stimulate multiple chemically cell receptors and thus the odour is transmitted to the brain. There after the brain interprets the type of smell.

    6b)
    i)Shell
    ii)Membranes
    iii)Airspace
    iv)Albumen
    v)Yolk
    vi)Chalaza

    6ci)
    autotrophs are organisms that can synthesizes food from inorganic substances by using chemical energy or light

    6cii)
    i)Bacteria
    ii)Unicellular algae

    6d)
    i)providing leadership on matters critical to health
    ii)shaping the research agenda and stimulating the generation
    iii)translation and dissemination of valuable knowledge
    iv)setting norms and standards
    v)promoting and monitoring their implementation

    6e)
    i)plants: Water Wisteria and Java Moss.
    ii)Animals: catfish and earthworm

    6f)
    In tabular form
    -Mammalian skin-
    i)It has melanin
    ii)It has sweat pores
    iii)Does not show photosynthesis
    iv)It composes of animal cells
    v)It is touch receptive
    -Plant epidermis-
    i)It has chlorophyll
    ii)It has stomata
    iii)It shows photosynthesis
    iv)It is composed of plant cells
    v)It is not touch receptive

    6gi)
    i)Intra specific competition

    6gii)
    i)Inter specific competition
    ===============================

    ANSWER LOADING……………….

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    Master Solution April 19, 2017 Categories: WAEC 1233


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    4 Comments

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      April 19, 2017 at 3:01 pm

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