IB Biology Topic 3

Ampicillin (Amp) is an antibiotic. A plasmid carrying a gene for Amp resistance was used to transform bacteria in a tube of broth. A control tube without plasmid was also produced. The results were plated as shown. Which plate has only colonies of transformed bacteria?

• A

• B

• C

• D

Tags

NGSS.HS-LS3-2

For what purpose are restriction endonucleases used in the laboratory?

• To limit the length of DNA molecules in the nucleus

• To cut specific base sequences to open DNA molecules

• To prevent release of DNA from the nucleus

• To protect viral DNA from digestion by bacterial enzymes

Into how many DNA fragments would the strand shown be cut by HindIII?

• 2

• 3

• 4

• 5

What is produced by somatic-cell nuclear transfer?

• Adult sheep

• Cloned Embryos

• Rooted stem-cuttings

• Genetically modified food

Genetically modified maize, called Bt maize, is thought to be affecting the monarch butterfly (Danaus plexippus) in the USA. What is the reason for this?

• The monarch butterfly feeds on maize nectar, which contains Bt toxin.

• The monarch caterpillar feeds on maize leaves, which contain Bt toxin.

• Bt toxin kills the plants that the monarch caterpillar usually eats.

• Bt toxin is in maize pollen, which blows on to plants that the monarch caterpillar eats.

Tags

NGSS.HS-LS2-7

NGSS.HS-LS4-5

The diagram below shows a long bone. What is the structure labelled X?

• Compact bone

• Spongy bone

• Diaphysis

• Cartilage

Which are the four types of bones?

• Short, periosteum, long, regular

• Long, short, irregular, flat

• Compact, irregular, flat, long

• Flat, short, compact, regular

What structure is labelled X in the diagram below?

• Articular capsule

• Synovial fluid

• Articular cartilage

• Synovial membrane

Which structure forms part of a long bone?

• Bursae

• Articular capsule

• Meniscus

• Articular cartilage

What type of bone is the skull?

• Long

• Short

• Flat

• Irregular