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TLS Online TPP Program

#Question id: 7296

some of the following statements regarding to this experiment are given below. Which of the following statements is incorrect?

#Unit 5. Developmental Biology

  1. If a small piece of tissue from a plant stem or leaf is placed on a solid agar medium containing the appropriate nutrients and growth hormones, the cells will start to divide to form a disorganized mass of cells known as a callus.

  2. If a small piece of tissue from a plant stem or leaf is placed on a solid agar medium, it does not need any nutrients and growth hormones, the cells will start to divide to form a disorganized mass of cells known as a callus.
  3. The callus cells are then separated and grown in liquid culture, again containing the appropriate growth hormones

  4. In suspension culture, some of the callus cells divide to form small cell clusters. These cell clusters can resemble the globular stage of a dicotyledon embryo, and with further culture on solid medium, develop through the heart shaped and later stages to regenerate a complete new plant.

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TLS Online TPP Program

#Question id: 10533

#Unit 2. Cellular Organization

Following statements are regarding to the fluidity of a bilayer.

A. A lipid bilayer cools below a characteristic transition temperature, it undergoes a sort of phase change in which it becomes a liquid; that is, it loses its fluidity.

B. Above the transition temperature, the highly mobile lipids are in a state known as a liquid crystal.

C. The bilayer is thicker in the gel state than in the liquid crystal state due to the stiffening of the hydrocarbon tails at lower temperatures.

D. The transition temperature of a bilayer decreases with the chain length and the degree of saturation of its component fatty acid residues for the same reasons that the melting points of fatty acids increase with these quantities.

Which of the following combination is correct?
TLS Online TPP Program

#Question id: 10532

#Unit 2. Cellular Organization

A  closed, self-sealing solvent-filled vesicles that are bounded by only a single bilayer, known as:
TLS Online TPP Program

#Question id: 10531

#Unit 2. Cellular Organization

Flippases catalyze translocation of the aminophospholipids:
TLS Online TPP Program

#Question id: 10530

#Unit 2. Cellular Organization

The transfer of a lipid molecule across a bilayer, a process termed:
TLS Online TPP Program

#Question id: 2257

#Unit 2. Cellular Organization

Match the following property (Column I) with the transport mechanism (Column II).

Column I

Column II

A. Facilitated Transport

i. Requires specific protein

B. Active Transport

ii. Solute transported against its gradient

C. Cotransport

iii. Coupled to ATP hydrolysis

iv. Driven by movement of a cotransported ion down its gradient

TLS Online TPP Program

#Question id: 3649

#Unit 3. Fundamental Processes

In eukaryotes, clusters (tandem arrays) of about 20–50 replicons initiate simultaneously at defined times throughout: