Practice Questions

TLS Online TPP Program

#Question id: 7145

In the development of the nervous system, which is the correct order of events?

#Unit 5. Developmental Biology

First, cells must be specified to be neurons, second, these neurons must make connections with their targets, third, the neurons must migrate to their final position, and fourth, the neurons refine their synaptic connections.
First, cells must be specified to be neurons, second, the neurons must migrate to their final position, third, these neurons must make connections with their targets, and fourth, the neurons refine their synaptic connections.
First, cells must migrate to their final position, second, these cells must be specified to be neurons, third, the neurons must make connections with their targets, and fourth, the neurons refine their synaptic connections.
First, the prospective neurons must make connections with their targets, second, the neurons refine their synaptic connections, third, the neurons must migrate to their final position, and fourth, the cells are specified to become neurons.

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TLS Online TPP Program

#Question id: 2254

#Unit 2. Cellular Organization

If the intracellular [Ca2+] is 10⁻⁷ mol/L and the extracellular [Ca2+] is 2 × 10⁻³ mol/L, at what potential difference across the cell membrane will Ca2+ be at electrochemical equilibrium?

TLS Online TPP Program

#Question id: 2255

#Unit 2. Cellular Organization

Following statements are regarding to the Na+/K+ ATPase maintains the intracellular Na+ and K+ concentrations in animal cells. Which of the following statement is incorrect?

TLS Online TPP Program

#Question id: 2256

#Unit 2. Cellular Organization

Match the following inhibitors (Column I) with their effect (Column II).

Column I	Column II
A. A23187	I. endoplasmic reticulum Ca2+ ATPase inhibitor
B. valinomycin	II. Na+/K+ ATPase inhibitor
C. thapsigargin	III. K+ ionophore
D. ouabain	IV. Ca2+ ionophore

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: 2258

#Unit 2. Cellular Organization

The arrangement of microtubules in eukaryotic flagella is referred to as

TLS Online TPP Program

#Question id: 2259

#Unit 2. Cellular Organization

Which of the following is not a characteristic of prokaryotes?