Practice Questions

TLS Online TPP Program

#Question id: 547

The role of an enzyme in an enzyme-catalyzed reaction is to:

#Unit 1. Molecules and their Interaction Relevant to Biology

bind a transition state intermediate, such that it cannot be converted back to substrate.
ensure that all of the substrate is converted to product.
ensure that the product is more stable than the substrate.
increase the rate at which substrate is converted into product.

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TLS Online TPP Program

#Question id: 12174

#Unit 8. Inheritance Biology

Red-eyed female (X ^+X^+ ) crossed with white-eyed male (X^w Y) , all the F1 progeny shows the red phenotype, then what will be the probability of F2 phenotype;

i) Male with red eye phenotype

ii) Female with white eye phenotype

iii) Female with red eye phenotype

iv) Male with white eye phenotype

TLS Online TPP Program

#Question id: 12175

#Unit 8. Inheritance Biology

Colour blind are X-linked disorder, a colour blind male have daughter cross with colour blind male, then what will be the probability of colour blindness?

TLS Online TPP Program

#Question id: 12176

#Unit 8. Inheritance Biology

In a Z-linked characteristic, Cameo plumage, which produces brown feathers, while the wild-type plumage is a glossy metallic blue. If a pure blue-colored male is crossed with a cameo female, then what will be the probability of blue and cameo plumage of male and female in F2 phenotype?

TLS Online TPP Program

#Question id: 12177

#Unit 2. Cellular Organization

Calculate the free energy required to move 1 mol of K+ ions from the outside of the cell (where [K+] = 4 mM) to the inside (where [K+] = 140 mM) when the membrane potential is –70 mV and the temperature is 37°C.

TLS Online TPP Program

#Question id: 12178

#Unit 2. Cellular Organization

Following statements are regarding to V-class ATPases.

A. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the same direction.

B. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the same direction.

C. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the opposite direction.

D. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the opposite direction.

Which of the following combination is correct?

TLS Online TPP Program

#Question id: 12179

#Unit 2. Cellular Organization

Match the following human ABC proteins (Column I) with their function (Column II)

Which of the following is correct?