Biochemistry Mcqs - Set 9

1)   Which of these is not included in parenteral therapy ?

a. Carbohydrates
b. Fibres
c. Fats
d. Micronutrients
Answer  Explanation 

ANSWER: Fibres

Explanation:
No explanation is available for this question!


2)   Free radicals are chemical species which have______________?

a. Single unpaired electron in an outer orbit
b. Single paired electron in an outer orbit
c. Double unpaired electron in an outer orbit
d. Double paired electron in an outer orbit
Answer  Explanation 

ANSWER: Single unpaired electron in an outer orbit

Explanation:
No explanation is available for this question!


3)   In the physiological system, nitric oxide is known to act through_______________?

a. Cyclic AMP
b. Calcium ions
c. Cyclic GMP
d. Prostacyclins
Answer  Explanation 

ANSWER: Cyclic GMP

Explanation:
No explanation is available for this question!


4)   True about denaturation of protein is all except______________?

a. Unfolding occurs
b. Disruption of secondary structure occurs
c. Sequence of amino acids remain the same
d. Biological activity is retained
Answer  Explanation 

ANSWER: Biological activity is retained

Explanation:
No explanation is available for this question!


5)   Within the RBC hypoxia stimulates glycolysis by which of the following regulating pathways ?

a. Hypoxia stimulates pyruvate dehydrogenase by increased, 2, 3DPG
b. Hypoxia inhibits hexokinase
c. Hypoxia stimulates release of all glycolytic enzymes from Band 3 on RBC membrane
d. Activation of the regulatory enzymes by high PH
Answer  Explanation 

ANSWER: Hypoxia stimulates release of all glycolytic enzymes from Band 3 on RBC membrane

Explanation:
No explanation is available for this question!


6)   The abundant glycoprotein in the basement membrane and has binding domain for both ECM and cell-surface receptor is______________?

a. Laminin
b. Fibronectin
c. E – Cadherins
d. Tenascin
Answer  Explanation 

ANSWER: Laminin

Explanation:
No explanation is available for this question!


7)   Normal serum alkaline phosphatase level is_____________?

a. 100-400 Bodansky units
b. 1000-4000 Bodansky units
c. 0.1-0.4 Bodansky units
d. 1-4 Bodansky units
Answer  Explanation 

ANSWER: 1-4 Bodansky units

Explanation:
No explanation is available for this question!


8)   The following are derived from cholesterol, EXCEPT_____________?

a. Bile acids
b. Steroid hormones
c. Vitamin D
d. Energy
Answer  Explanation 

ANSWER: Energy

Explanation:
No explanation is available for this question!


9)   Enzyme regulating the conversion of ethanol to acetaldehyde________________?

a. Alcohol dehydrogenase
b. Acetaldehyde dehydrogenase
c. Catalase
d. Enolase
Answer  Explanation 

ANSWER: Alcohol dehydrogenase

Explanation:
No explanation is available for this question!


10)   The normal range of serum osmolality (in mosm/L) is_____________?

a. 280 to 295
b. 300 to 320
c. 350 to 375
d. 200 to 250
Answer  Explanation 

ANSWER: 280 to 295

Explanation:
No explanation is available for this question!


11)   The fuel value of fat is____________?

a. 4
b. 7
c. 9
d. 5
Answer  Explanation 

ANSWER: 9

Explanation:
No explanation is available for this question!


12)   Heme is converted to bilirubin mainly in_____________?

a. Kidney
b. Liver
c. Spleen
d. Bone marrow
Answer  Explanation 

ANSWER: Spleen

Explanation:
No explanation is available for this question!


13)   In molecular cloning, Blue White screening is used for_______________?

a. To screen for recombinant vectors
b. To detect gene mutations
c. To identify desired chromosomal DNA insert in plasmid vectors
d. To detect host DNA in situ
Answer  Explanation 

ANSWER: To identify desired chromosomal DNA insert in plasmid vectors

Explanation:
No explanation is available for this question!


14)   Enzymes increase reaction rates by______________?

a. Altering the free energy of the action
b. Inhibiting the backward reaction
c. Enhancing the forward reaction
d. Decreasing the energy of activation
Answer  Explanation 

ANSWER: Decreasing the energy of activation

Explanation:
No explanation is available for this question!


15)   Which of the following is most important content of diet ?

a. Protein
b. Water
c. Vitamin
d. Minerals
Answer  Explanation 

ANSWER: Minerals

Explanation:
No explanation is available for this question!


16)   In all the following RNA participates directly except________________?

a. Post translation modification
b. Post transcriptional modification
c. DNA replication
d. Splicing
Answer  Explanation 

ANSWER: Post translation modification

Explanation:
No explanation is available for this question!


17)   Normal level of serum phosphorous is_____________?

a. 2.5 – 4.5 mgm%
b. 7-9 mgm%
c. 40-50 mgm%
d. 1-2 mgm%
Answer  Explanation 

ANSWER: 2.5 – 4.5 mgm%

Explanation:
No explanation is available for this question!


18)   Inside the cell, the substance, which contributes to most of the osmolality, is________________?

a. Protein
b. Potassium
c. Urea
d. Phosphate
Answer  Explanation 

ANSWER: Potassium

Explanation:
No explanation is available for this question!


19)   Daily requirement of iron in man is_____________?

a. 1gm
b. 10 microgram
c. 10 mg
d. 20 mg
Answer  Explanation 

ANSWER: 10 mg

Explanation:
No explanation is available for this question!


20)   In human body which of the following trace element is next to iron_______________?

a. Ca++
b. Zn++
c. Cu++
d. Selenium
Answer  Explanation 

ANSWER: Zn++

Explanation:
No explanation is available for this question!


21)   Ferritin – an inactive form of iron is stored in_____________?

a. Gut
b. Spleen
c. Liver
d. All of the above
Answer  Explanation 

ANSWER: Liver

Explanation:
No explanation is available for this question!


22)   Peroxidase enzyme contain______________?

a. Chromium
b. Selenium
c. Magnesium
d. Calcium
Answer  Explanation 

ANSWER: Selenium

Explanation:
No explanation is available for this question!


23)   Translation occurs at______________?

a. Mitochondria
b. Centrosome
c. Nucleus
d. Ribosome
Answer  Explanation 

ANSWER: Ribosome

Explanation:
No explanation is available for this question!


24)   Chargaff rule states that___________?

a. A+G=T+C
b. A/T=G/C
c. A=U=T=G=C
d. A+T=G+C
Answer  Explanation 

ANSWER: A+G=T+C

Explanation:
No explanation is available for this question!


25)   Codons are present on_____________?

a. m-RNA
b. DNA
c. t-RNA
d. Ribosomal RNA
Answer  Explanation 

ANSWER: m-RNA

Explanation:
No explanation is available for this question!


26)   The portion of DNA in Which RNA polymerase binds and starts transcription is called______________?

a. Terminator
b. Anti terminator
c. Operator
d. Promoter region
Answer  Explanation 

ANSWER: Promoter region

Explanation:
No explanation is available for this question!


27)   End product of purine metabolism is______________?

a. Creatinine
b. Uric acid
c. Xanthine
d. Phosphates
Answer  Explanation 

ANSWER: Uric acid

Explanation:
No explanation is available for this question!


28)   All are true of the genetic code except____________?

a. Degenerate
b. Universal
c. Punctuation
d. Non overlapping
Answer  Explanation 

ANSWER: Punctuation

Explanation:
No explanation is available for this question!


29)   R-RNA is mainly produced mainly in___________?

a. Nucleus
b. Nucleolus
c. Ribosome
d. Endoplasmic reticulum
Answer  Explanation 

ANSWER: Nucleolus

Explanation:
No explanation is available for this question!


30)   On complete hydrolysis of DNA we will get all the following except______________?

a. Deoxy pentose sugar
b. Phosphoric acid
c. Adenosine
d. Purine bases
Answer  Explanation 

ANSWER: Adenosine

Explanation:
No explanation is available for this question!