Life Sciences Practice Test 5

1. Which of the following compounds is NOT found in tears?

IgA

Lactoferin

Lysozyme

IgE

2. Chediak-Higashi syndrome is caused due to deficiency of_________

Nutrophils

Mast cell

Basophils

Nk cells

3. Which of the following steps is NOT involved in the activation of T-cell?

Double positive cell converts to single positive T-cell

Foreign peptide bound to MHC provide signals

CD23 has ITAM, which transducer signals

CD28 of TCR interacts with B7 of APC

4. Synthesis of antibodies takes place by which of the following cells?

Lymph

B-cells

Bone marrow cells

T-cells

5. Name the nerve stimulator which is responsible for the pain of the inflammation.

Histamines

Prostaglandin

Bradikinins

Kinins

6. Which of the following statement is INCORRECT about superantigens?

Activate a large number of T-cells

Viral or bacterial proteins

Unique binding ability

Endogenous by nature

7. Which of the following is also known as fruitless plants?

Gymnosperm

Bryophytes

Pteridophyte

Angiosperm

8. What is the origin of B-cell?

Pancreas

Bone marrow

Thymus

Liver

9. Match the correct columns.

 1 - Adelphous                            A - Anther of different stamen is infused state
 2 - Syngansious                          B - Filament of different stamen is fused
 3 - Synandrous                           C - Stamen is attached to the petals
 4 - Epipelalous                          D - Anther and filament both are fused

1-C, 2-A, 3-B, 4-D

1-B, 2-A, 3-D, 4-C

1-D, 2-C, 3-A, 4-B

1-A, 2-D, 3-B, 4-C

10. In arthropods, Ecdysis or moulting is a process of casting off the skin.

True

False