B Part 2 Flashcards
A farmer is forcing garden asparagus (asparagus officinalis) by growing under black plastic to totally exclude light. This produces bone-white asparagus but on exposure to light , it becomes green. Which of these sequences nest describes the plastid organelles present at each stage?
Etioplasts that become chloroplasts
What is the name of the photosynthetic plasmid found in the glaucophyta?
Cyanoplast
Which part of a GPCR detaches and acts on the effector?
G-alpha
What protein is involved in anteretrograde transport or organelles along tubulin?
Kinesin
What is the thylakoid membrane of chloroplast in the viridiplantae comprised of?
Mostly galactolipids, some sulfolipids and a trace of phospholipids
Which microfilament structures are required for sarcomere function in muscle cells in the mammalia?
Actin and myosin
Which of these is NOT present ion chloroplasts in the ochrophyta?
Chlorophyll b
Which calcium-binding protein is found in cell-cell adhesion junctions?
Cadherins
A new leaf is forming which is wrapped in a bud as it grows as it not exposed to light until it is partially unfurled. After about a week, the young leaf is attacked by a parasitic insect that lays eggs in the leaf tissue. Which best describes the chain of plastid differentiation therein.
Etioplasts become chloroplasts and some of the latter become tannosomes
What is the name of the organism that is closest known relative of the ancestor of all eukarya?
Candidatus Prometheoarchaeum syntrophicum
Common signalling molecules found in the viridiplantae?
- Methyl jasmonate
- Hex-3-en-1-yl acetate
3.methyl salicylate - Cis-hex-3-en-1-ol
Which tier of cell-cell signalling uses the connexon?
Juxtacrine signalling
Signalling molecules in the eukarya?
Hydrogen sulfide
Cyclic AMP (cAMP0
Carbon monoxide
Nitric oxide
In an organism that has octoploid (8n) somatic cells, what would be the chromosome count in the gametes?
1n
Which nucleotide phosphate is bound to G-actin to activate it before polymerisation?
Guanosine 5’-triphosphate
The release of insulin by the pancreas and its action on hepatocytes is an example of what?
Endocrine signalling
What metabolic mode best describes the ancestral member of the archaea that all eukarya evolved from?
A chemolithoautotroph using molecular hydrogen as the electron donor
What are tubulin tubules anchored?
Centrosome
Which of these is in the correct range for the maximum number of times a typical hepatocyte in any member of the mammalia can divide?
50 times out of
Which of these is in the correct range for the maximum number of times a typical hepatocyte in any member of the mammalia can divide?
50 times
