IB Biology B1-4

Form and Function

___ fatty acids have comparatively lower melting points than  ____ fatty acids.

Unsaturated, saturated

What does the acronym CAM mean?

Cell-adhesion molecules

In the diagram of a chloroplast shown, where will the Calvin cycle take place? (i, ii, iii, or iv)

i

Which type of ion channel is involved in synaptic transmission?

neurotransmitter-gated ion channel

Cholesterol is a component of animal cell membranes. Identify one of the main functions within the plasma membrane.

It reduces membrane fluidity at high temperatures.

Pluripotent stem cells are  ___ cells that can turn into almost any type of cell in the body. They can be obtained from the inner cell mass of a ___

undifferentiated , blastocyst

What is the terminal function of the photosystems I and II in the thylakoid membranes of the chloroplast?

To transfer electrons through ReDox reactions

In fruit flies, the wing forms from a structure called the larval imaginal disc, which are epithelial cells that are marked for future wing development. What molecules are present in the developing wing that impacts gene expression within the early stage embryo?

Morphogens

The diagram below shows phloem sieve tubes. Which of the following is correct about the function of part X and Y?

X is active translocation, Y is metabolic support

The innermost layer of an artery wall is called the tunica intima and contains the smooth lining called the  ____ layer. This lines the lumen of the artery in order to decrease ____

endothelial; friction

Which of the following is correct for the way in which carbon dioxide enters the leaves of terrestrial and aquatic plants?

terrestrial plants: Carbon dioxide enters the leaves through the stomata. aquatic: carbon dioxide dissolves in the water and enters through the leaves by diffusion

How is marram grass (Ammophila arenaria) adapted to life in the sand dunes?

Long roots that can grow deeply into the sand, anchoring the plant in place

Nicotinic acetylcholine receptors are an example of ____ ion channels and sodium potassium channels are an example of  ____ channels.

neurotransmitter-gated; voltage-gated