#Question id: 415
#Unit 1. Molecules and their Interaction Relevant to Biology
Which one of the following compounds does not have a large negative free energy of hydrolysis?
#Question id: 11201
#Unit 7. System Physiology – Animal
Why are action potentials usually conducted in one direction?
#Question id: 19474
#Unit 12. Applied Biology
#Question id: 14764
#Unit 2. Cellular Organization
Match the following proteins (Column I) with their function (Column II). Which of the following is correct?
|
Column I |
Column II |
|
a. Profilin |
i. binds to the (+) end of an actin filament,
thereby inhibiting subunit addition or loss. |
|
b. Cofilin |
ii. blocks (−) ends, inhibits filament disassembly, to
stabilize filaments |
|
c. Thymosin-β4 |
iii. involved in actin treadmilling, but it binds
specifically to F-actin in which the subunits contain ADP |
|
d. Cap Z |
iv. binds ADP–G-actin and catalyzes the exchange of
ADP for ATP |
|
e. Tropomodulin |
v. binds to ATP–G-actin in such a way that it
inhibits addition of the actin subunit to either end of the filament. |
#Question id: 7312
#Unit 5. Developmental Biology
Following
statements regarding to the classes of genes that regulate floral development:
A. Floral organ identity genes
directly control floral identity. The proteins encoded by these genes are
transcription factors that likely control the expression of other genes whose
products are involved in the formation and/or function of floral organs.
B. Cadastral genes act as spatial
regulators of the floral organ identity genes by setting boundaries for their
expression.
C. Meristem identity genes are
necessary for the initial induction of the organ identity genes. These genes
are the positive regulators of floral organ identity.
D. Cadastral genes act as
negative regulators of the floral organ identity genes by inhibits their
expression.
E. Meristem identity genes are
the negative regulators of floral organ identity genes.
Which of the above statements are true?