Multiple Choice QuestionsWhich one of the following is the correct description of a certain part of a normal human skeleton?
Parietal bone and the temporal bone of the skull are joined by fibrous joint
First, vertebra is axis, which articulates with the occipital condyles
The 9th and 10th pairs of ribs are called the floating ribs
The 9th and 10th pairs of ribs are called the floating ribs
Which one of the following are the correct pairing of a body part and the kind of muscle tissue that moves it?
Heart wall - Involuntary unstriated muscle
Biceps of upper arm - smooth muscle fibres
Abdominal wall - Smooth muscle
Abdominal wall - Smooth muscle
Keeping in view the 'fluid mosaic model' for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop moment)?
Both lipids and proteins can flip-flop
While lipids and proteins can flip -flop
While proteins can flip-flop, lipids cannot
While proteins can flip-flop, lipids cannot
Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
Coelomic fluid
blood
gut peristalsis
gut peristalsis
A.
Coelomic fluid
The body cavity (coelom) of an earthworm is filled with an alkaline, colourless or milky coelomic fluid containing water, salts, some proteins and four types of coelomic corpuscles, ie, phagocytes, mucocytes, circular nucleated cells and chloragogen cells. The coelomic fluid becomes turgid and acts as a hydraulic skeleton during burrowing.
Earthworm (Pheretime posthuma) living in burrows which are made in moist earth. It makes its burrow which is made in the moist earth. it makes its burrow partly by boring with its pointed anterior end and partly sucking and swallowing the earth. The body shows metameric segmentation. About the middle of each segment, there is a ring of tiny curved bristles called setae or chaetae, formed of any nitrogenous organic substance known as chitin. The setae and musculature serve for locomotion as well as for anchoring body firmly in the burrow.
The blood of earthworm is composed of a fluid plasma and colourless corpuscles, physiologically comparable to the leucocytes of vertebrates.
Which one of the following items gives its correct total number?
Floating ribs in humans - 4
Amino acids found in proteins - 16
Types of diabetes - 3
Types of diabetes - 3
In human body, which one of the following is anatomically correct?
Floating ribs - 2 pairs
Collar bones - 3 pairs
Salivary glands - 1 pair
Salivary glands - 1 pair
Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing micro-organism
casuarina equisetifolia
crotalaria juncea
cycas revoluta
cycas revoluta
Which of the following is an example of negative feedback loop in humans?
constriction of skin blood vessels and contraction of skeletal muscles when it is too cold
secretion of tears after falling of sand particles into the eye
salivation of mouth at the sight of delicious food
salivation of mouth at the sight of delicious food
The contractile protein of skeletal muscle involving ATPase activity is
tropomyosin
myosin
α-actinin
α-actinin
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