Friday, August 22, 2014

Biology Quiz for SSC Exams with Explanation

Biology Quiz

  • 1. Jaundice is caused due to the infection of

    1. Brain
    2. Liver
    3. Kidney
    4. Spleen
    Answer And Explanation
    Answer: Option B
    Explanation:
    Note: Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae( whites of the eyes), and other mucous membranes caused by hyperbilirubinemia(increased levels of bilirubin in the blood). This hyperbilirubinemia subse-quently causes increased levels of bilirubin in the extracellular fluid. Jaundice is often seen in liver disease such as hepatitis or liver cancer. Jaundice can occur if: too any red blood cells are dying or breaking down and going to the liver; the liver is overloaded or damaged; or the bilirubin from the liver is unable to move through the digestive tract properly.

Biology Quiz

  • 2. The are of human tongue sensitive to bitterness is restricted to:

    1. Tip
    2. Edges
    3. Middle Part
    4. Posterior Part
    Answer And Explanation
    Answer: Option D
    Explanation:
    Note: The bitterness can be tested at the posterior part of the tongue. Bitter taste is one of four taste receptors of the tongue. It is used to be thought that they were located towards the back of the tongue.

Biology Quiz

  • 3.The average heart beat rate per minute in a normal person is

    1. 82
    2. 92
    3. 72
    4. 100
    Answer And Explanation
    Answer: Option C
    Explanation:
    Note:The average heart rate of adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute, in actuality the heart beat rate is not and should not be constant. In fact, the contemporary understanding is that the degree to which the heart beat varies is a key indicator of health and well being. Conversely, the degree to which it does not vary is a key indicator of health risk. The "72 beats per minute" that we are familiar with is the normal average heart beat rate.

Biology Quiz

  • 4. EEG records the activity of

    1. Heart
    2. Lungs
    3. Brain
    4. Muscles
    Answer And Explanation
    Answer: Option C
    Explanation:
    Note: Electroencephalography(EEG) is the recording of electrical activity along the scalp. EEG measures voltage fluctuations resulting from ionic current flows within the neurons of the brain. In clinical contexts, EEG refers to the recording of the brain's spontaneous electrical activity over a short period tie, usually 20-40 minutes, as recorded from multiple electrodes placed on the scalp. Diagnostic applications generally focus on the spectral content of EEG, that is, the type of neural oscillations that can be observed in EEG signals. In neurology, the main diagnostic application of EEG is in the case of epilepsy.

Biology Quiz

  • 5. The colour of cow's milk is slightly yellow due to the presence of 

    1. Xanthophyll
    2. Riboflavin
    3. Ribulose
    4. Carotene
    Answer And Explanation
    Answer: Option D
    Explanation:
    Note: Yellow milk is commonly related to the diet that the cow is on. Grass is the most common diet that will turn milk yellow, due to a compound in the grass that makes it green called Carotene. Carotene is a kind of plant-steroid that makes plants the vibrant colours they are, and this carries through the body of the grazer that eats these plants. Carotene mostly affects the color of fat. Since milk is comprised of around 3.5% milk fat, a dairy cow that is grass-fed tends to produce yellow milk, over 

Biology Quiz

  • 6. Small Pox is caused by

    1. Rubeola Virus
    2. Variola Virus
    3. Varicella
    4. Myxovirus
    Answer And Explanation
    Answer: Option B
    Explanation:
    Note:Smallpox was an infectious disease unique to humans, caused by either of two virus variants, Variola major and Variola minor. The disease is also known by the Latin names Variola or Variola vera which is a derivative of the Latin varius meaning "Spotted" or varus meaning "pimple". After vaccination campaigns throughout the 19th and 20th centuries, the WHO certified the eradication of smallpox in 1979.

Biology Quiz

  • 7. A vitamin requires cobalt for its activity. The vitamin is

    1. Vitamin B12
    2. Vitamin D
    3. Vitamin B2
    4. Vitamin A
    Answer And Explanation
    Answer: Option A
    Explanation:
    Note: Vitamin B12 also called cobalamin is a water-soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood. It is one of the eight B vitamins. It is normally involved in the metabolism of every cell of the human body, especially affecting DNA synthesis and regulation, but also fatty acid synthesis and energy production. Vitamin B12 consists of a class of chemically related compounds, all of which have vitamin activity. It contains the biochemically rare element Cobalt.

Biology Quiz

  • 8. What may be the cause of malfunctioning of thyroid gland?

    1. Iodine deficiency
    2. Iron Deficiency
    3. Calcium Deficiency
    4. Vitamin C
    Answer And Explanation
    Answer: Option A
    Explanation:
    Note: The main reason for thyroid malfunctioning is the deficiency of Iodine. Since iodine is a trace mineral found in food that combines with Tyrosine to make both T3 and T4, both of the hormones produced in the thyroid, a lack of it can lead to under production of thyroid hormones.

Biology Quiz

  • 9. Which one of the following is found only in Women? 

    1. Thyroid
    2. Pituitary
    3. Ovary
    4. Adenoid
    Answer And Explanation
    Answer: Option C
    Explanation:
    Note: Men don't have ovary. Women have a pair of ovaries which is a sexual gland responsible for producing estrogen. In men, testis has same functions as ovary in women. It produces testosterone.

Biology Quiz

  • 10. Water in Plants is transported by

    1. Cambium
    2. Phloem
    3. Epidermis
    4. Xylem
    Answer And Explanation
    Answer: Option D
    Explanation:
    Note: Water is transported in plants through Xylem vessels, these begin the roots and end in the leaves of the plant, water is translocated through a combination of "Transpirational Pull" and capillary action.

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