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Chapter 6 - Life Processes

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BIOLOGICAL CLASSIFICATION

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Mcqs Question

Question No.1:
What are/is defining characteristics of life?

A: Molecular movement

B:Growth

C:Gross movement

D: Increase in mass

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    Question No.2:
    How does in single celled organism uptake of food, exchange of gases and removal of waste takes place?

    A: Simple diffusion

    B:Respiration

    C:Oxidation – Reduction

    D: None of the above

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    Question No.3:
    A series of chemical reaction the body undergoes to breakdown or built up sources of energy for various molecular movement and growth is

    A: Oxidation-Reduction reaction

    B:Single – Replacement

    C:Double replacement

    D: Combustion

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    Question No.4:
    The process of acquiring oxygen from outside the body, and use it in the process of breaking down food material for cellular need is known as

    A: Diffusion

    B:Excretion

    C:Respiration

    D: Transportation

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    Question No.5:
    With the help of which chemical reaction carbon dioxide is converted to carbohydrates in the process of photosynthesis.

    A: Reduction

    B:Oxidation

    C:Combustion

    D: None

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    Question No.6:
    What is the mode of nutrition where carbon and energy requirements are fulfilled by inorganic sources in the form of carbon dioxide and water

    A: Heterotrophic nutrition

    B:Autotrophic nutrition

    C:Holozoic nutrition

    D: Saprophytic

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    Question No.7:
    In which form do plants store their internal energy reserves?

    A: Glycogen

    B:Starch

    C:Glucose

    D: Fructose

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    Question No.8:
    In which form do animals store their internal energy reserves?

    A: Glucose

    B:Fat

    C:Glycogen

    D: Fructose

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    Question No.9:
    During the process of photosynthesis events that necessarily takes place in sequence are absorption, conversion, splitting, reduction; but in which plant the events of photosynthesis does not occur in sequence given.

    A: Cactus

    B:Mango

    C:Jamun

    D: Lemon

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    Question No.10:
    In which form nitrogen is taken up by plant during photosynthesis?

    A: Inorganic nitrates and nitrites

    B: Nitrogen gas

    C:Ammonia

    D: Proteins

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    Question No.11:
    Tiny pore on the surface of leaves through which massive gaseous exchange takes place is

    A: Stomatal pores

    B:Secretory pores

    C:Meristamatic pores

    D: Cuticular pores

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    Question No.12:
    State which of the following statement is/are true

    A: Massive gaseous exchange takes place only through stomata

    B:Gaseous exchange takes place through stems and roots only

    C:Excexchange of gases occurs across the surface of stems, roots and leaves as well

    D: None of the statement is correct

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    Question No.13:
    Opening and closing of stomatal pores are governed by guard cells. When the guard cells are swollen by the entry of water the pores are

    A: Open

    B: Closed

    C: Partially closed

    D: Partially open

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    Question No.14:
    Opening and closing of stomatal pores are governed by guard cells. When the guard cells are swollen by the entry of water the pores are

    A: Open

    B: Closed

    C: Partially closed

    D: Partially open

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    Question No.15:
    Heterotrophic organisms are unable to manufacture their own food and must obtain it in organic form from their environment. In this context state which of the following group of organism are heterotrophs.

    A: Moulds, yeast, mushrooms

    B:Amoeba

    C:Both a and b

    D: Blue green algae

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    Question No.16:
    Group of organism that break-down dead and decayed the food material outside the body and then absorb it, playing an important part in ecosystem by nutrient recycling are

    A: Parasitic organism

    B:Saprophytes

    C:Autotrophs

    D: Holozoic organisms

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    Question No.17:
    Which one among the following is parasitic organism

    A: Cuscuta (Amar-bel)

    B:Bread mold

    C:Mushrooms

    D: Green algae

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    Question No.18:
    An amylase present in the saliva of human being catalyzes the hydrolysis of which of the following substrate

    A: Starch

    B:Protein

    C: Fat

    D: Cellulose

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    Question No.19:
    Pepsin secreted by the gastric glands of stomach acts upon which substrate?

    A: Starch

    B:Protein

    C:Fat

    D: Cellulose

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    Question No.20:
    Gastric glands secretes which of the following secretion

    A: Hydrochloric acid

    B:Pepsin

    C:Both a) and b)

    D: Trypsinogen

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    Question No.21:
    The longest part of alimentary canal is

    A: Large intestine

    B:Small intestine

    C:Oesophagus

    D: Duodenum

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    Question No.22:
    Which of the following category of animals have small intestine

    A: Carnivorous

    B:Herbivorous

    C:Omnivorous

    D: Scavengers

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    Question No.23:
    Which one of the following organ is the site of the complete digestion of carbohydrates, protein and fats

    A: Large Intestine

    B:Small Intestine

    C:Stomach

    D: Liver

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    Question No.24:
    Respiration an essential physiological activity in which oxygen is utilized for biological oxidation and carbon dioxide is given out. Which of the following substrate is oxidized in the first step?

    A: Fatty acid

    B: Starch

    C:Glycogen

    D: Glucose

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    Question No.25:
    During respiration 6 carbon molecule is initially broken down into 3 carbon molecules. Which of the following compound is 3 carbon molecule

    A: Acetyl CoA

    B:Pyruvate

    C:Glucose

    D: Carbon dioxide

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    Question No.26:
    The conversion of 6 carbon molecule to 3 carbon molecule during respiration takes place in which of the following compartment/subcellular component of cell?

    A: Cytoplasm

    B:Mitochondria

    C:Ribosomes

    D: Nucleus

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    Question No.27:
    The conversion of pyruvate into ethanol and carbon dioxide rather than 3 molecules of carbon dioxide and water takes place during.

    A: Anaerobic Respiration

    B:Aerobic Respiration

    C:Anoxic Respiration

    D: Oxic Respiration

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    Question No.28:
    The complete breakdown of pyruvate in the presence of oxygen into carbon dioxide, water and energy takes place in which compartment of cell?

    A: Cytoplasm

    B: Mitochondria

    C:Ribosomes

    D: Nucleus

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    Question No.29:
    During intense physical exercise the muscles get depleted of oxygen. In the lack of oxygen the pyruvate get converted to which of the following compound in the muscles?

    A: Ethanol

    B:Malic acid

    C:Lactic acid

    D: Carbon dioxide

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    Question No.30:
    During the process of inhalation which of the following process takes place

    A: Inter costal muscles contract and pulls ribs upward and outward, diaphragm flattens and become tight

    B:Inter costal muscles relaxes and pulls ribs upward and outward, diaphragm flattens and become tight

    C:Intercostal muscles contract, pulls ribs upward and outward, diaphragm contract

    D: Inter costal muscles relaxes and pulls ribs inward, diaphragm become tight

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    Question No.31:
    Why is it that we can’t empty out our lungs?

    A: Due to the amount of nitrogen contained in the air

    B:Due to air pollution

    C:The lungs would collapse and not be able to inflate again

    D: Helium can’t leave the lungs

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    Question No.32:
    Observe the following statements and state which one of the following is/are wrong?

    A: The atrium has thin wall

    B:Ventricles have thicker wall

    C:Oxygen rich blood from the lungs comes to the left atrium

    D: Oxygen rich blood is pumped out to the body through superior vena cava

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    Question No.33:
    Observe the following statements and state which one of the following is/are wrong?

    A: The atrium has thin wall

    B:Ventricles have thicker wall

    C:Oxygen rich blood from the lungs comes to the left atrium

    D: Oxygen rich blood is pumped out to the body through superior vena cava

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    Question No.34:
    The animals that have high energy needs such as birds and mammals fulfill it in which of the following ways?

    A: By tolerating some mixing of the oxygenated and de-oxygenated blood stream

    B:By totally separating the right side and the left side of the heart so that oxygenated and deoxygenated blood do not mix.

    C:By having only three chambered heart

    D: By having only two chambered heart

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    Question No.35:
    Which one of the following is the feature of double circulatory system?

    A: The blood pass through the heart to gills, then after purification, blood is distributed to different parts of body.

    B:The blood follows two routes, one for oxygenated blood and the other for deoxygenated blood.

    C:Only one cardiac cycle is completed

    D: It is a type of open circulatory system

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    Question No.36:
    How do veins ensure that the blood flows only in one direction?

    A: By having thick wall

    B:By the presence of valves

    C:By having thick wall as well as presence of valves

    D: Blood do not flow in one direction in them

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    Question No.37:
    The blood vessels that connect arterial system to our venous system are?

    A: Aorta

    B:Superior Vena Cava

    C:Inferior Vena Cava

    D: Capillaries

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    Question No.38:
    Leakage in blood vessels leads to loss of pressure and reduce efficiency of the pumping system. Which type of blood cell plug these leaks of blood vessels.

    A: White blood cells

    B:Red blood cells

    C:Platelets

    D: Plasma

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    Question No.39:
    Clear to white colored interstitial fluid, containing cellular components of blood and with lesser protein component is

    A: Lymph

    B:Plasma

    C:R.B.Cs

    D: W.B.Cs

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    Question No.40:
    Straw colored extracellular fluid, devoid of cellular component of blood is

    A: Lymph

    B:Plasma

    C:R.B.Cs

    D: W.B.Cs

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    Question No.41:
    Which of the following is/are not the function/feature of xylem tissue?

    A: Provide mechanical strength to the plant

    B:Flow of water and minerals in xylem tissues is unidirectional

    C:Transport of water through xylem is energy driven

    D: Xylem consists of tracheary elements

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    Question No.42:
    Water conducting channels in xylem tissue is/are made up of?

    A: Sieve tube

    B:Companion cells

    C:Vessels only

    D: Vessels and trachieds

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    Question No.43:
    Which one of the following is an unavoidable consequence of photosynthesis

    A: Translocation

    B:Transpiration

    C:Osmotic pressure

    D: Respiration

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    Question No.44:
    The driving force in the movement of water in the xylem is

    A: Osmotic pressure

    B:Transcription

    C:Both a and b

    D: Energy from ATP

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    Question No.45:
    The major driving force in the upward movement of water in the xylem at night is

    A: Root pressure

    B:Transcription

    C:Both a and b

    D: Energy from ATP

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    Question No.46:
    The translocation of food and other substances takes place in

    A: Unidirection

    B:Bi-direction

    C:Upward direction

    D: Downward direction

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    Question No.47:
    Which one of the following cells in the plants are dead cells

    A: Sieve tubes

    B:Companion cells

    C:Tracheary elements

    D: All are dead cells

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    Question No.48:
    Phloem tissue are made up of

    A: Sieve tubes

    B:Companion cells

    C:Tracheary elements

    D: Sieve tubes and companion cells

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    Question No.49:

    A:

    B:

    C:

    D:

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