Bio-Inorganic Chemistry free Mock Test

Patients suffering from Wilson’s disease have:

Mg2+ is preferred in photosynthesis by chlorophyll because-

The ligand system present in vitamin B12 is,

Superoxide dismutase contains the metal ions:

The oxidation state of iron in methemoglobin is:

The cooperative binding Of O₂ in hemoglobin is due to:

The correct set of the biologically essential elements, is

Molybdoenzymes can both oxidize as well as reduce the substrates, because

Under physiological condition, oxygen is binding to deoxyhemoglobin and deoxymyoglobin, the binding curve and its pH dependence respectively, are

High dose of dietary supplement ZnSO₄ for the cure of Zn deficiency,

The total number of metal ion and the number of coordinated imidazole units of histidine in the active site of oxy-hemocyanin, respectively are-

The extent of π electron conjugation in macrocyclic rings of (i) heme, (ii) coenzyme B₁₂ and (iii) chlorophyll follows the order,

The changes (from A-D given below) which occur when O₂ binds to hemerythrin are

(A) One iron atom is oxidized

(B) Both the iron atoms are oxidized

(C) O₂ binds to one iron atom and is also hydrogen-bonded.

(D) O₂ binds to both the iron atoms and is also hydrogen-bonded.

The number of histidine amino acid nitrogen atoms coordinated to bimetallic active site of oxyhemocyanin and oxyhemerythrine, respectively are,

The resonance Raman stetching frequency (V_0-0  in cm^-1) of O₂ is 1580. The V_0-0 for O₂ in bound oxy-hemoglobin is close to:

The Fe—N_porphyrin bond distances in the deOxy and Oxy-hemoglobin, respectively are

The metal present at the active site of the protein Carboxypept idase A is,

The biological functions of the cytochrome P₄₅₀ and myoglobin are respectively,

In biological systems, the metal ion involved in the Dioxygen transport besides Fe is,

Deoxy-Hemocyanin is,

Carboxypeptidase contains

Iron–sulphur clusters in bio logical systems are involved in,

The reduction of nitrogen to ammonia, carried out by the enzyme nitrogenase, needs

The amino acid side chain high affinity for Ca²⁺ and Cu²⁺ in metallo–proteins is,

In bacterial ruberdoxin, the number of iron atoms, sulfur bridges and cysteine ligands are:

When a reduced cytochrome transfers an electron from its Fe(II) to the bound O₂

A metal ion that replace manganese (II) ion in Mangano–proteins without changing its function, is

In photosynthesis, the predominant metal present in the reaction centre of photo –system II is,

Zn in carbonic anhydrase is coordinated by three hist idine and one water molecule. The reaction of CO₂ with this enzyme is an example of,

The changes (from A–D given below) which occur when O₂ binds to hemerythrin are:
(A) One ion atom is oxidized.
(B) Both the iron atoms are oxidized.
(C) O₂ binds to one iron atom and is also hydrogen bonds.
(D) O₂ binds to both the iron atoms and is also hydrogen bonded.

Amongst the following, the group that is bound to the metal ion in coenzyme B₁₂ is,

In biological systems, the metal ions involved in electron transport are,

Based on the behavior of the metalloenzymes, consider the following statements:

(A) In the enzymes, the zinc act ivates O₂ to form peroxide species.
(B) In the enzymes, the zinc activates H₂O and provides a zinc bound hydroxide.
(C) In the enzymes, the zinc activates O₂ to break the bounding between the two oxygens.
(D) Zincion acts as a nucleophile and attacks at the peptide carbonyl.

The set of correct statements is,

In the transformation of oxyhaemoglobin to deoxyhaemoglobin,

Among the following pair of metal ions present in Nature. The first one functions as an electron transfer agent and the second one catalyzes the hydrolysis reactions. The correct pair is,

Fe²⁺ -porphyrins fail to exhibit reversible oxygen transport and cannot differentiate CO from O₂. However, the hemoglobin is free from both these pit falls. Among the following the correct set of statements is:

(A) Fe²⁺-porphyrins undergo μ-oxodimer formation and the same is prevented in case of the hemoglobin.
(B) Fe–CO bond strength is much low in case of hemoglobin when compared to the Fe²⁺ -porphyrins.
(C) While Fe–CO is linear, Fe–O₂ is bent and is recognized by hemoglobin.
(D) The interlinked four monomeric units in the hemoglobin are responsible to overcome the pitfalls.

A well known naturally occurring organometallic compound is,

The red color of oxyhaemoglobin is mainly due to the

Hemoglobin is an oxygen carrying. The correct statement about oxy–hemoglobin is that,

Oxymyoglobin Mb(O₂) and oxyhaemoglobin Hb(O₂)₄, respectively, are

Among the given pH values, the O₂ binding efficiency of hemoglobin is maximum at,

Identify the function of Hemocyanin and the Metal responsible for it,

During Oxygen Transport by Hemerythrin, Oxygen is bound as,

At pH 7.2 and 10 Torr oxygen partial pressure, the extent of O₂ binding is,

Which statement are incorrect for L to  Metal Charge Transfer,