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TLS Online TPP Program

#Question id: 12187

How cells know whether sister kinetochores are properly attached to the mitotic spindle?

#Unit 2. Cellular Organization
  1. When sister chromatids are correctly attached to microtubules, their kinetochores are under tension. Mitotic spindle attached to the kinetochores pull at them, and the cohesin molecules that hold the sister chromatids together withstand these forces, creating tension at kinetochores.
  2. When sister chromatids are correctly attached to microtubules, their kinetochores are not under tension. One kinetochore attaches to microtubules emanating from two opposite spindle poles.
  3. When sister chromatids are correctly attached to microtubules, their kinetochores are not under tension. Both sister kinetochores attach to microtubules emanating from the same spindle pole.
  4. When sister chromatids are correctly attached to microtubules, their kinetochores are not under tension. Only one of the two sister kinetochores attaches to microtubules.
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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.
TLS Online TPP Program

#Question id: 12728

#Unit 13. Methods in Biology

Name the type of RNA which folds up to give a cloverleaf secondary structure.
TLS Online TPP Program

#Question id: 12729

#Unit 13. Methods in Biology

When the two antiparallel strands of DNA are held together partly by the weak forces between complementary bases and partly by hydrophobic interaction between adjacent , stacked base pairs termed as_____