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TLS Online TPP Program

#Question id: 31400

During each month of the female sexual cycle, there is a cyclical increase and decrease of FSH and LH, as shown in the figure. Which of the following statement is incorrect regarding uterine cycle?

#Unit 7. System Physiology – Animal
  1. The endometrium increases rapidly in thickness from the 5th to the 14th days of the menstrual cycle.
  2. After 14th days, the endometrium becomes more highly vascularized and slightly edematous under the influence of estrogen and progesterone from the corpus albicans.
  3. Late in the luteal phase, the endometrium, like the anterior pituitary, produces prolactin.
  4. When the corpus luteum regresses, hormonal support for the endometrium is withdrawn about 4 days before the next menses.
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TLS Online TPP Program

#Question id: 27667

#Unit 1. Molecules and their Interaction Relevant to Biology

There are few statements is given regarding the peptide bond are given

(a) For most peptide bonds the ratio of cis to trans configurations is approximately 1:1000

(b) Peptide bonds formed between Xaa and proline (Xaa is any amino acid) the cis to trans ratio is 1:4

(c) Co and N atoms of the peptide grouping are both in planar sp2 hybridization 

(d) All three kinds of bonds (N-Ca, Ca-Co, and the Co-N peptide bond) are single bonds

(e) The peptide bond is estimated to have 40% double bond character

Choose which of the following is correct 
TLS Online TPP Program

#Question id: 27668

#Unit 1. Molecules and their Interaction Relevant to Biology

In a peptide bond the true electron density is intermediate. The barrier to C-N bond rotation/to keep the amide group planar requires of about
TLS Online TPP Program

#Question id: 27669

#Unit 1. Molecules and their Interaction Relevant to Biology

When Psi is fixed at +165º then allowed region -70º to -170º then this allowed region belong to 

(a) Left-handed helix

(b) Right-handed helix

(c) Parallel beta sheet 

(d) Antiparallel beta sheet

Choose which of the following is correct 
TLS Online TPP Program

#Question id: 27670

#Unit 1. Molecules and their Interaction Relevant to Biology

When Phi is fixed at -80º. Clashes occur at all Psi angles except: 
(a) +10º to -55º for alpha helix
(b) +10º to -55º for beta strand 
(c) +90º to 180º for alpha helix
(d) +90º to 180º for beta strand
Choose which of the following is correct
TLS Online TPP Program

#Question id: 27671

#Unit 1. Molecules and their Interaction Relevant to Biology

The range for Pro residues cyclic side chain has
TLS Online TPP Program

#Question id: 27672

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following Ramachandran plot showing correct graph for trans-proline possible phi and psi positions