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TLS Online TPP Program

#Question id: 664

Which is evidence that structures for proteins determined by X-ray crystallography represent the structures in solution?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Their similarity to structures determined by NMR.

  2. The protein crystals are soluble in water.

  3. The proteins must align in a regular pattern to form a crystal.

  4. Only one conformation is ever possible for a protein so it is irrelevant whether the protein is in a crystal or in solution.

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TLS Online TPP Program

#Question id: 12722

#Unit 6. System Physiology – Plant

Eleven amino-acid consensus sequence motif TAQAAKEKAXE is repeated in the protein,  is the structural characteristics of which type of group of LEA protein?
TLS Online TPP Program

#Question id: 12723

#Unit 6. System Physiology – Plant

GroEL, GroES is an example of the  prokaryotic cell, this HSP protein is belong to the which of the following HSP class?
TLS Online TPP Program

#Question id: 12724

#Unit 6. System Physiology – Plant

In response to sudden, 5 to 10°C rises in temperature, plants produce a unique set of proteins referred to as heat shock proteins (HSPs). There are five classes of heat shock proteins found in plants such as;

       HSP class

 Examples (Arabidopsis / prokaryotic)

      Cellular location

 

I) HSP100

 

 

a) AtTCP-1 / GroEL, GroES

 

i) Cytosol

 

II) HSP90

 

 

b) Various AtHSP22, AtHSP20, AtHSP18.2, AtHSP17.6 / IBPA/B

 

ii) mitochondria

 

III) HSP70

 

 

c) AtHSP101 / ClpB, ClpA/C

 

iii) chloroplasts

 

IV) HSP60

 

 

d) AtHSP70 / DnaK

 

iv) endoplasmic reticulum

 

V) smHSP

 

 

e) AtHSP90 / HtpG

 

Match the following HSPs   with their correct location and the examples of the HSPs;
TLS Online TPP Program

#Question id: 12725

#Unit 13. Methods in Biology

Match the following

DNA form

Helix Direction

Number of bases per helix turn

1. B

a. Left Handed

i. 10

2.  A

b. Right Handed

ii. 12

3.  C

c. Left Handed

iii. 14

4. Z

d. Right Handed

iv. 9
TLS Online TPP Program

#Question id: 12726

#Unit 13. Methods in Biology

Name the forms of DNA which have been derived under laboratory conditions.
TLS Online TPP Program

#Question id: 12727

#Unit 13. Methods in Biology

Name the form of DNA which may be produced with a DNA sequence made up from alternating purine and pyrimidine nucleotides.