Column I Column II P. Keratin (i) Liver Q. Surfactants (ii) Pancreas R. Pro-carboxypeptidase (iii) Lung S. Albumin (iv) Skin
Protein-Organ Expression Matching
This question requires matching specific proteins listed in Column I with the organs where they are primarily or maximally expressed, as given in Column II.
Column I Protein Identification
- P. Keratin: A structural protein predominantly found in epithelial cells, forming the outer layer of skin, hair, and nails.
- Q. Surfactants: Specifically, pulmonary surfactants are crucial for reducing surface tension in the alveoli of the lungs.
- R. Pro-carboxypeptidase: A precursor to an enzyme involved in protein digestion, synthesized and secreted by the pancreas.
- S. Albumin: The main protein found in blood plasma, primarily synthesized by the liver.
Column II Organ Identification
- (i) Liver: Major site for synthesizing plasma proteins like albumin.
- (ii) Pancreas: Produces digestive enzymes and their precursors.
- (iii) Lung: Produces pulmonary surfactants.
- (iv) Skin: Contains structural proteins like keratin in its outer layers.
Matching Proteins to Organs
Based on the functions and locations of these proteins:
- Keratin (P) is maximally expressed in the Skin (iv).
- Surfactants (Q) are maximally expressed in the Lung (iii).
- Pro-carboxypeptidase (R) is maximally expressed in the Pancreas (ii).
- Albumin (S) is maximally expressed in the Liver (i).
Final Matches
The correct matching is:
| Column I | Column II |
| P. Keratin | (iv) Skin |
| Q. Surfactants | (iii) Lung |
| R. Pro-carboxypeptidase | (ii) Pancreas |
| S. Albumin | (i) Liver |
This corresponds to the pairing P-(iv), Q-(iii), R-(ii), S-(i).
Important Questions from Plant Biochemistry Enzymes Reactions
- Match the following digestive enzymes in Column I with their respective functions in Column II.
Column I Column II P. Erepsin (i) converts proteins to peptides Q. Steapsin (ii) activates trypsinogen to trypsin R. Pepsin (iii) converts fat into fatty acid and glycerol S. Enterokinase (iv) converts polypeptides to amino acids Identify the free radicals (marked as '?') in sequence from the inter-conversion of reactive oxygen species as shown below.
$O_2\rightarrow? \rightarrow H_2O_2 \rightarrow? \rightarrow H_2O$
P. $\mathrm{O}_2^{\bullet -}$
Q. $OH^-$
R. $HO_2^{-}$
S. $\ {}^{1}\mathrm{O}_2$
- Choose the CORRECT set of matches between group I and group II in relation to nitrogen fixation and assimilation
GROUP I GROUP II P. Nitrobacter 1. $NO_3^-$ $\rightarrow$ $NO_2^-$ Q. Nitrite reductase 2. $N_2$ $\rightarrow$ $2NH_3$ R. Nitrogenase 3. $NO_2^-$ $\rightarrow$ $NH_4^+$ S. Nitrate reductase 4. $NO_2^-$ $\rightarrow$ $NO_3^-$ - Select the CORRECT combination by matching Group-I with Group-II.
Group-I Group-II P. Photorespiration 1. Glutamate $\rightarrow$ 2-Oxglutarate Q. Respiration 2. Acetyl-CoA $\rightarrow$ Malonyl-CoA R. Amino acid degradation 3. 2-Oxglutarate $\rightarrow$ Succinyl-CoA S. Fatty acid synthesis 4. Glycine $\rightarrow$ Serine - During cellular respiratory process, pyruvate must be oxidized to acetyl CoA and $CO_2$ before it enters the citric acid cycle. The corresponding simplified equation is
Pyruvate + $NAD^+$ + CoASH $\longrightarrow$ Acetyl-S-CoA + NADH + $CO_2$
This oxidation reaction occurs in mitochondria and is carried out in presence of the enzyme
