Oxygen affinity for hemoglobin is affected by Ph and this phenomenon is known as Bohr’s effect.

Which of the following statements is correct regarding the oxidation number of Oxygen? I. The oxidation number of Oxygen in most compounds is -2. II. When Oxygen is bonded to Fluorine in compounds like Oxygen difluoride and Dioxygen diflouride, the Oxygen is assigned an oxidation number of +2 and +2 respectively. III. In peroxide, an Oxygen atom is assigned an oxidation number of -1 and in Superoxide, each oxygen atom is assigned an oxidation number of -1/2.

A

I only

B

II only

C

I and III only

D

I, II, and III

The sequence of amino acids in hemoglobin molecules of humans is more similar to the hemoglobin of chimpanzees than it is to the hemoglobin of dogs. This similarity suggests that

A

humans and dogs are more closely related than humans and chimpanzees

B

humans and chimpanzees are more closely related than humans and dogs

C

humans are related to chimpanzees but not to dogs

D

humans and chimpanzees are closely analogous

Hemoglobin is a molecule that binds to both Oand CO There is an allosteric relationship between the concentrations of Oand CO Hemoglobin's affinity for O2

A

decreases as blood pH decreases

B

increases as H+ concentration increases

C

increases in exercising muscle tissue

D

decreases as CO2 concentration decreases

The acidification of oceans is increasing. Why is this phenomenon a cause of concern? 1. The growth and survival of calcareous phytoplankton will be adversely affected. 2. The growth and survival of coral reefs will be adversely affected. 3. The survival of some animals that have phytoplanktonic larvae will be adversely affected. 4. The cloud seeding and formation of clouds will be adversely affected. Which of the statements given above is/are correct?

A

1, 2 and 3 only

B

2 only

C

1 and 3 only

D

1, 2, 3 and 4

The graph above shows the oxygen dissociation curves of maternal hemoglobin and fetal hemoglobin. Based on the graph, it can be concluded that

A

fetal hemoglobin surrenders O2 more readily than maternal hemoglobin

B

the dissociation curve of fetal hemoglobin is to the right of maternal hemoglobin

C

fetal hemoglobin has a higher affinity for O2 than does maternal hemoglobin

D

fetal and maternal hemoglobin differ in structure

In a well aerated and agitated microbial culture, the 'supply' of oxygen is equal to 'demand' (uptake) of the growing culture. The K_La for such a system will be (K_La = volumetric mass transfer coefficient, C* = dissolved oxygen concentration in liquid in equilibrium with gaseous oxygen, C = instantaneous value of dissolved oxygen concentration, 'r' = specific oxygen uptake rate per unit weight of cells, X = dry weight of the cells per unit volume)

A

$$\frac{{\left( {rX} \right)}}{{\left( {C* - C} \right)}}$$

B

$$\frac{{\left( r \right)}}{{X\left( {C* - C} \right)}}$$

C

$$\frac{{\left( {C* - C} \right)}}{{\left( {rX} \right)}}$$

D

$$\frac{{\left( X \right)}}{{r\left( {C* - C} \right)}}$$

Which of the following statement/s is/are correct with respect to carbon monoxide? a) The affinity of CO for hemoglobin is 210 times greater than that of oxygen. b) Excess of CO result in death by asphyxiation.

A

Both statements are false

B

Only statement b is true

C

Both statements are true.

D

Only statement a is true.

In terms of Bohr radius a0, the radius of the second Bohr orbit of a hydrogen atom is given by √2 a0.

A

True

B

False

Which of the following statements about gene therapy are correct?
P. Affected individuals, but not their progeny, can be cured through germline gene therapy.
Q. Affected individuals, as well as their progeny, can be cured through germline gene therapy.
R. Affected individuals, but not their progeny, can be cured through somatic gene therapy.
S. Affected individuals, as well as their progeny, can be cured through somatic gene therapy.

A

P and R only

B

P and S only

C

Q and R only

D

Q and S only

A pulse oximeter shows the percentage of venous hemoglobin in the oxyhemoglobin (HbO2) and hemoglobin (Hb).

A

True

B

. a) True [ False

Oxygen affinity for hemoglobin is affected by Ph and this phenomenon is known as Bohr’s effect.

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