The time gap between the two instants , one before and one after 12 : 00 noon , when the angle between the hour hand and the minute hand 66° , is

TLS Online TPP Program

#Question id: 24263

#Unit 2. Cellular Organization

Choose the incorrect option

TLS Online TPP Program

#Question id: 2585

#Unit 2. Cellular Organization

Which of the following is the correct sequence that describes the excitation and contraction of a skeletal muscle fiber?

A. Tropomyosin shifts and unblocks the cross-bridge binding sites.

B. Calcium is released and binds to the troponin complex.

C. Transverse tubules depolarize the sarcoplasmic reticulum.

D. The thin filaments are ratcheted across the thick filaments by the heads of the myosin molecules using energy from ATP.

E. An action potential in a motor neuron causes the axon to release acetylcholine, which depolarizes the muscle cell membrane.

TLS Online TPP Program

#Question id: 18867

#Unit 13. Methods in Biology

_________ is used to acquire total magnification.

TLS Online TPP Program

#Question id: 2714

#Unit 2. Cellular Organization

HAT enzymes react with the side-chain of lysine to form the following structure. What effect will the HAT enzymes have on histones?

TLS Online TPP Program

#Question id: 15820

#Unit 8. Inheritance Biology

Your friends Ben and Jane are contemplating having children and seek your genetic counsel. Ben and Jane are unrelated, but both have younger brothers with the same, extremely rare genetic trait. (In fact, Ben and Jane met at a support group meeting for children and families of children with this rare disorder.) Ben’s parents and Jane’s parents are all unaffected.          

Assume that the trait is autosomal recessive with complete penetrance. What is the probability that Ben and Jane’s first child will be affected with the trait? If not affected, what is the probability that the child is a carrier?