IB Biology

A Unity and Diversity

A1.1 Water

A1.2 Nucleic acids

A2.1 Origins of cells

A2.2 Cell structure

A2.3 Viruses [HL only]

A3.1 Diversity of organisms

A3.2 Classification and cladistics [HL only]

A4.1 Evolution and speciation

A4.2 Conservation of biodiversity

B Form and Function

B1.1 Carbohydrates and lipids

B1.2 Proteins

B2.1 Membranes and membrane transport

B2.2 Organelles and compartmentalization

B2.3 Cell specialization

B3.1 Gas exchange

B3.2 Transport

B3.3 Muscle and motility [HL only]

B4.1 Adaptation to environment

B4.2 Ecological niches

C Interaction and Interdependence

C1.1 Enzymes and metabolism

C1.2 Cell respiration

C1.3 Photosynthesis

C2.1 Chemical signalling [HL only]

C2.2 Neural signalling

C3.1 Integration of body systems

C3.2 Defence against disease

C4.1 Populations and communities

C4.2 Transfers of energy and matter

D Continuity and Change

D1.1 DNA replication

D1.2 Protein synthesis

D1.3 Mutation and gene editing

D2.1 Cell and nuclear division

D2.2 Gene expression [HL only]

D2.3 Water potential

D3.1 Reproduction

D3.2 Inheritance

D3.3 Homeostasis

D4.1 Natural selection

D4.2 Stability and change

D4.3 Climate change

Question rangeB2.1.4—Integral and peripheral proteins

[Maximum number: 1]

Which function is accomplished by structures X and Y in the Paramecium?

excretion

digestion

homeostasis

feeding

movement

food storage

respiration

DNA replication

Two models of plasma membrane structure are shown.

[Maximum number: 1]

In the diagram, which structure is an intrinsic or integral protein?

[Maximum number: 7]

The electron micrograph shows the surface membrane of an animal cell.

[Maximum number: 1]

Which are functions of membrane proteins?

Hormone binding sites and DNA replication

Cell adhesion and translation

Cell to cell communication and protein pumps

Passive transport and glycolysis

The diagram shows a section through the surface of an animal cell.

[Maximum number: 1]

A number of different proteins are involved in nerve function. Which of the following does not require a membrane protein?

Active transport of sodium

Diffusion of $\mathrm{K}^{+}$ into the cell

Diffusion of the neurotransmitter across the synapse

Binding of the neurotransmitter to the post-synaptic membrane

[Maximum number: 1]

The diagram shows the cross section of a plasma membrane.

What is found in area X ?

Glycolipid

Glycoprotein

Polar amino acid

Non-polar amino acid