#Question id: 1224
#Unit 4. Cell Communication and Cell Signaling
Put the steps of the process of signal transduction in the order they occur.
1. A conformational change in the signal-receptor complex activates an enzyme.
2. Protein kinases are activated.
3. A signal molecule binds to a receptor.
4. Target proteins are phosphorylated.
5. Second messenger molecules are released.
#Question id: 2294
#Unit 2. Cellular Organization
________ use such high magnification that even atoms are discernable.
#Question id: 26980
#Unit 10. Ecological Principles
Which of the following statements about the selection pressure is incorrect?
a.If survival of juveniles and adult is poor then selection favours a single act of reproduction
b.If survival of juveniles and adult is poor and unpredictable then selection favours repeated reproduction and long reproductive life
c.If the environment is stable then selection favours a single act of reproduction.
d.If survival of juveniles is very poor and unpredictable but adult are more likely to survive then selection favours repeated reproduction and long reproductive life
e.If survival of adult is unpredictable but juveniles are more likely to survive then selection favours a single act of reproduction
#Question id: 12694
#Unit 8. Inheritance Biology
A panel of cell lines was created by human—mouse somatic-cell hybridization. Each line was examined for the presence of human chromosomes and for the production of an enzyme. The following results were obtained:
On the basis of these results, which chromosome has the gene that encodes the enzyme?
#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;