IB Biology SL D Continuity & Change Question Bank

Practise IB Biology SL D Continuity and Change through questions on genes, inheritance, evolution and biodiversity change.

Covered syllabus points

D1.1 DNA replication D1.2 Protein synthesis D1.3 Mutation and gene editing D2.1 Cell and nuclear division 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

[Maximum number: 1]

What is required to replicate DNA?

Temperature of $37^{\circ} \mathrm{C}$

Free nucleotides carrying A, C, G and T bases

Plasmids

Endonuclease

[Maximum number: 8]

Mitosis produces genetically identical cells, which become specialized by expressing specific genes. This ensures that tissues and organs are adapted to their functions.

(a)

Outline how the behaviour of chromosomes during mitosis ensures the production of genetically identical cells.

[ 4 ]

(b)

Describe how mRNA is produced in the nucleus.

[ 4 ]

[Maximum number: 2]

Psammonobiotus balticus belongs to a group of protists (unicellular eukaryotic organisms) that have a shell surrounding most of the cell, which provides shelter from predators. The graph shows the frequency of varying shell lengths in a population of P. balticus.

Figure for Question D Continuity and Change question 3 — IB Biology SL

Mutations may increase variation within a species. Compare and contrast substitution and insertion mutations.

[Maximum number: 1]

Which process contributes to growth of a multicellular body?

Exocytosis

Meiosis

Mitosis

Osmosis

All question bank results loaded

Covered syllabus points

D Continuity and Change question 1

D Continuity and Change question 2

Question (a)

Question (b)

D Continuity and Change question 3

D Continuity and Change question 4