OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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receptors-allows for cellular communication
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channels-act as “hallways” to allow substances to enter and exit cells
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antibodies-protect the body from invaders that can make it sick
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hemoglobin-helps to clot the blood
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Detailed explanation-1: -Fibrinogen… A specialized protein or clotting factor found in blood. When a blood vessel is injured, thrombin, another clotting factor, is activated and changes fibrinogen to fibrin.
Detailed explanation-2: -Hemoglobin is found in cells called red blood cells. Hemoglobin is a pigment in these red blood cells that’s responsible for carrying oxygen towards the tissues that need them and carbon dioxide away from them. Hemoglobin is not responsible for forming blood clots however, so this option is also incorrect.
Detailed explanation-3: -As its name suggests, hemoglobin is composed of “heme” groups (iron-containing rings) and “globins” (proteins). In fact, hemoglobin is composed of four globin proteins-two alpha chains and two beta chains-each with a heme group. The heme group contains one iron atom, and this can bind one molecule of oxygen.