Wednesday, January 4, 2012

science bookss

online biology courses


Hormones Objective type Questions

1. Hormones
(A) Act as coenzyme
(B) Act as enzyme
(C) Influence synthesis of enzymes
(D) Belong to B-complex group
2. Hormone that binds to intracellular receptor is
(A) Adrenocorticotropic hormone
(B) Thyroxine
(C) Follicle stimulating hormone
(D) Glucagon
3. Hormone that bind to cell surface receptor and require the second messenger camp is
(A) Antidiuretic hormone
(B) Cholecystokinin
(C) Calcitriol
(D) Gastrin
4. A hormone secreted from anterior pituitary is
(A) Growth hormone (B) Vasopressin
(C) Oxytocin (D) Epinephrine
5. A hormone secreted from posterior pituitary is
(A) Vasopressin
(B) Thyrotropic hormone
(C) Prolactin
(D) Adrenocorticotropic hormone
6. The number of amino acids in human growth hormone is
(A) 91 (B) 151
(C) 191 (D) 291
7. Growth hormone causes hyperglycemia. It is a result of
(A) Decreased peripheral utilization of glucose
(B) Decreased hepatic production via gluconeogenesis
(C) Increased glycolysis in muscle
(D) Decrersed lipolysis
8. Acromegaly results due to excessive release of
(A) Thyroxine (B) Growth hormone
(C) Insulin (D) Glucagon
9. Growth hormone is released by
(A) Somatostatin
(B) Growth hormone releasing hormone
(C) Prolactin release inhibiting hormone
(D) Luteinizing releasing hormone
10. The number of amino acids in prolactin is
(A) 134 (B) 146
(C) 172 (D) 199
Correct if any answer is wrong

1. C 2. B 3. A 4. A 5. A 6. C 7. A 8. B 9. B 10. D

Mcq question bank Immune system

1. The immunity acquired by inoculation of living organism of attenuated virulence is
a. Artificial active immunity
b. Passive immunity
c. Natural active immunity
d. Local immunity
2. Organisms can be attenuated for inoculation by
a. Growing it at a temperature higher than optimum
b. By passage through animals of different species which are less susceptible to it
c. By continous cultivation in presence of antagonistic substance
d. Any one of the above
e. None of these
3. Passive immunity lasts for the period of about
a. 10 days
b. 2 – 3 months
c. 10 years
d. None of the above
4. The markers helpful in detecting antiimmunity are
a. Hyper gamma globulinaemia
b. Circulating antibodies
c. Response to cortisone
d. Lymphoid hyperplasia
e. All of these
5. Following substance may act as an antigen
a. Egg albumin
b. RBC and serum
c. Vegetable protein
d. Snake venom
e. All of these
6. H antigen are present in
a. Motile organ
b. Non-motile organ
c. Both a & b
d. None of these
7. Antitoxin is used for _____ immunization.
a. Active b. Passive
c. Both a and b d. None of these
8. The agglutinin test is used for _______
a. Identification of isolated bacteria
b. Typing of bacterial species
c. Study of antigenic structure of bacteria
d. All of these
e. None of these
9. In blood transfusion it is essential that
a. Blood of hologous group should always be same
b. Direct matching between patient’s serum and donor’s corpuscles be performed
c. Both a & b
d. None of these
10. To be anaphylactic, the sensitizing substance should be
a. Protein in nature
b. Should have a large molecular weight
c. Soluble in tissue fluids
d. All of the above
e. None of these
11. The basics of pathology in asthama,allergic rhinitis, urticaria are
a. Local vasodilation
b. Increased capillary secretion
c. Excess eosinophils in tissue secretion and blood
d. All of these
12. Which test is used for detecting susceptibility of an individual to diphtheria toxin?
a. Schick tests b. Dick test
c. V-P test d. Precipitin test
13. Syndromes associated with Human T lymphotropic virus type I(HTLV-I) are
a. Adult T-cell lymphoma
b. Hairy cell leukemia
c. Adult T cell leukemia
d. All of these
1. a 2. d 3. a 4. e 5. c 6. a 7. b 8. d 9. c 10. b 11. e 12. a 13. b

Few MCQ Objective questions on Cancer

1. Movement of cancer cells to a new site where a secondary tumour begins is called 
A. anaplasia.
B. metastasis.
C. promotion.
D. vascularization.

2. Increased blood flow to a cancerous tumor is called 
A. anaplasia.
B. metastasis.
C. malignancy.
D. vascularization.
3. Which of the following is a characteristic of cancer cells? 
A. Differentiated.
B. Contact inhibition.
C. Poor blood supply.
D. Disorganized growth.
4. The process by which new blood vessels supply a growing tumour is 
A. metastasis.
B. promotion.
C. malignancy.
D. vascularization.
5. Which of the following is a characteristic of cancer cells? 
A. Cellular differentiation.
B. Loss of contact inhibition.
C. Decreased oxygen uptake.
D. Inability to actively transport molecules.
6. A proto-oncogene is described as DNA that 
A. causes cancer.
B. causes the vascularization of a tumour.
C. can be mutated into cancer-causing DNA.
D. directly causes uncontrolled cellular growth.

7. A cancer-causing gene is called a(n) 
A. initiator.
B. promoter.
C. oncogene.
D. proto–oncogene.
8. One difference between proto-oncogenes and oncogenes is that oncogenes have the potential to 
A. infect viruses.
B. inhibit cancer cells.
C.produce more hormones.
D. induce cancerous transformations.
9. Use the following information to answer question: 1. Promotion 2. Metastasis 3. Anaplasia 4. Initiation Which of the following is the correct sequence for the development of cancer? 
A. 1, 4, 3, 2
B. 3, 4, 2, 1
C. 4, 1, 3, 2
D. 4, 3, 2, 1
10. Which of the following is capable of changing a proto-oncogene into an oncogene? 
A. virus
B. antibody
C. bacterium
D. lymphocyte
11. Use the following information to answer the question: 1. promotion 2. metastasis 3. vascularization 4. anaplasia Which of the following is the correct sequence to describe the order of development of a cancerous tumor? 
A. 1, 4, 3, 2
B. 2, 1, 3, 4
C. 3, 2, 1, 4
D. 3, 4, 1, 2
12. Which of the following might indicate the presence of a developing skin cancer? 
A. Persistent coughing.
B. Change in bowel habits.
C. Difficulty in swallowing.
D. A sore that does not heal.


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