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BIOLOGY M.C.Q (1 Marks)

MODEL PAPER 8 · Gujarat Board (GSEB) STD 11 Science (GSEB - English Medium). 12 questions.

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M.C.Q (1 Marks)

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12 questions · self-marked practice — reveal the answer and mark yourself.

MCQ 11 Mark
What is the residual volume of air in a normal human?
  • A
    1.4 to 1.6 litre
  • B
    0.7 to 0.9 litre
  • C
    1.0 to 1.2 litre
  • D
    1.2 to 1.4 litre
Answer
(c) 1.0 to 1.2 litre
Explanation: Residual volume (RV) is about 1100 ml to 1200 ml which is the volume of air still remaining in the lungs after the expiratory reserve volume is exhaled.
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MCQ 21 Mark
The pH of human urine is approximately:
  • A
    7
  • B
    7.5
  • C
    6
  • D
    6.5
Answer
(c) 6
Explanation: The pH of human urine is approximately 6.
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MCQ 31 Mark
Which plant has a fungal association in the form of mycorrhiza?
  • A
    Pinus
  • B
    Sequoia
  • C
    Cedrus
  • D
    Cycas
Answer
(a) Pinus
Explanation: Roots in some genera of gymnosperms have a fungal association in the form of mycorrhizal (Pinus).
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MCQ 41 Mark
How many daughter cells are formed after mitotic division in case of arithmetic growth?
  • A
    4
  • B
    3
  • C
    2
  • D
    1
Answer
(c) 2
Explanation: There are two types of growth rates - Arithmetic and Geometric. In arithmetic growth rate, out of the two daughter cells produced by the mitotic division of a cell, only one daughter cell continues to divide while the other differentiates and matures.
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MCQ 51 Mark
The lymph in frog lacks:
  • A
    RBC and plasma
  • B
    Plasma and WBCS
  • C
    WBCs and few proteins
  • D
    RBCs and few proteins
Answer
(d) RBCs and few proteins
Explanation: The lymph is different from the blood. It is known as tissue fluid. Lymph is yellowish in colour as it lacks RBCs and few proteins. 
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MCQ 61 Mark
Which of the following is removed from our body by lungs?
  • A
    $CO _2$ only
  • B
    Ammonia
  • C
    $CO _2$ and $H _2 O$
  • D
    $H _2 O$ only
Answer
(c) $CO _2$ and $H _2 O$
Explanation: Our lungs remove large amounts of $CO _2$ (18 litres/day) and also significant quantities of water every day.
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MCQ 71 Mark
Pigment of PS-I occurs in:
  • A
    Appressed parts of granal thylakoids
  • B
    Both Appressed parts of granal thylakoids and Stromal thylakoids
  • C
    Stromal
  • D
    Stromal thylakoids and non-appressed parts of granal thylakoids
Answer
(d) Stromal thylakoids and non-appressed parts of granal thylakoids
Explanation: The pigment of Photosystem I occurs in stromal thylakoids and non-appressed parts of granal thylakoids. PS-I absorbs light of a wavelength of less than 780 nm.
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MCQ 81 Mark
A person breathes in some volume of air by forced inspiration after having a forced expiration. This quantity of air taken in is:
  • A
    Tidal volume
  • B
    Inspiratory capacity
  • C
    Vital capacity
  • D
    Total lung capacity
Answer
(c) Vital capacity
Explanation: Vital capacity is the maximum volume of air that a person can breathe in after forced expiration or the maximum volume of air that a person can breathe out after forced inspiration. 
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MCQ 91 Mark
Ground tissue consists of:
  • A
    Epidermis and cortex
  • B
    All tissues external to endodermis
  • C
    All tissues except epidermis and vascular tissue
  • D
    All tissues internal to endodermis
Answer
(c) All tissues except epidermis and vascular tissue
Explanation: The ground tissue of plants includes all tissues that are neither dermal nor vascular. It can be divided into three classes based on the nature of the cell walls.
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MCQ 101 Mark
Which of the following elements is highest in percentage composition in the human body?
  • A
    Hydrogen
  • B
    Carbon
  • C
    Nitrogen
  • D
    Oxygen
Answer
(d) Oxygen
Explanation: By mass, oxygen is the most abundant element in the human body. most of the body consists of water or H₂O. Oxygen accounts for 61-65% of the mass of the human body. Even though there are many more atoms of hydrogen in your body than oxygen, each oxygen atom is 16 times more massive than a hydrogen atom.
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MCQ 111 Mark
Which hormone maintains the volume of urine produced by kidneys?
  • A
    Atrial Natriuretic factor
  • B
    Testosterone
  • C
    Adrenal hormone
  • D
    Anti Diuretic hormone
Answer
(d) Anti Diuretic hormone
Explanation: Anti Diuretic hormone or ADH is also called arginine vasopressin. It's a hormone made by the hypothalamus in the brain and stored in the posterior pituitary gland. It tells your kidneys how much water to conserve. ADH constantly regulates and balances the amount of water in your blood.
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MCQ 121 Mark
The scientific name of organisms should be written as:
  • A
    Species subspecies
  • B
    Genus species
  • C
    Species genus
  • D
    Subspecies species
Answer
(b) Genus species
Explanation: Mangifera Indica. Here, Mangifera is a generic name while Indica is a specific name. Hence, the correct option is the Genus species.
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