Which of the following is true about lectins? a) Lectins are carbohydrate bindin

Question

Which of the following is true about lectins? a) Lectins are carbohydrate binding proteins b) Lectins play roles in cell-signaling and cell-cell interactions c) Receptors for lectins are cell-surface glycoproteins d) All of the above 2. Which of the following statements about the cellular and non-cellular components of blood is false? a) water is the most abundant component of plasma b) plasma does not contain red blood cells c) blood serum contains mostly albumins and globulins d) blood serum contains albumins, globulins and clotting factors 3. You have generated an antibody to a human protein called Nesprin-1 by injecting purified human Nesprin-1 into a rat To detect Nesprin-1 from human cells in a western-blot press which HRP (horse radish peroxidase)-conjugated secondary antibody would you use? a) rat anti-rabbit b) rat anti-mouse c) rabbit-anti rat d) mouse anti-rabbit 4. In your tissue printing lab some vegetables stained poorly for peroxidase (purple) but showed intense staining with the protein stain (red). Which statement below is the best conclusion of this observation? a) There are low quantities of peroxidase compared to the amount of total protein present b) There are high quantities of peroxidase compared to the amount of total protein present c) There are equal quantities of peroxidase and other proteins present d) You cannot make a conclusion about peroxidase and protein quantities based on this observation Water ascends from the roots to the stem of a plant through which structure? a) Xylem b) Phloem c) Epidermis d) Cortex 5.

Explanation / Answer

1) d) All of the above

Lectins are carbohydrate binding proteins and perform recognition on cellular and molecular level, they are ubiquitous in nature and found in many foods.

2) d) blood serum contains albumins, globulins and clotting factors

Serum is similar in composition with plasma but lack clotting factors of blood

3) C)Rabbit anti rat

The secondary antibody should be against rat produced in rabbit . So it is rabbit -anti rat

4) a) There are low quantities of peroxidase compared to the amount of total protein present

5) a) xylem

Xylem is to transport water from roots to leaves and shoot

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