IB Bio HL1 Year 1 Review PS B

Identify the molecule illustrated.

• α-glucose

• β-glucose

• ribose

• deoxyribose

Chloroplasts in cells participate in complex chemical reactions. But chloroplasts taken out of cells and placed in test tubes do very little. Which term best explains the phenomenon responsible for the lack of chloroplast activity when isolated from their systems?

• cooperation

• competitive inhibition

• emergent properties

• homeostasis

An increase in CO₂ dissolved in blood leads to what change?

• Blood is more basic and pH increases

• Blood is more basic and pH decreases

• Blood is more acidic and pH increases

• Blood is more acidic and pH decreases

Water recovered from filtrate traveling through a nephron is returned to the circulatory system via the ... capillary bed.

Macromolecules are composed of monomers. Which of these CORRECTLY pairs a macromolecule with its monomer(s)?

• insulin = amino acids and heme groups

• cellulose = α-glucose

• triglyceride = glycerol and fatty acids

• amylose = 1-glucose and 4-glucose

Which of these is evidence that supports the theory of endosymbiosis? (Hint - all these statements are true... find the one that focuses on endosymbiosis!)

• both mitochondria and chloroplasts convert energy

• some eukaryotic cells have cell walls

• mitochondria and chloroplasts have circular chromosomes

• most eukaryotic cells have multiple mitochondria

Actin is a globular protein that forms filaments in many different types of cells. A disorder that disables actin filaments woudl most likely reduce what type of cellular activity?

• glycolysis

• movement

• transcription

• digestion

Veins have ... to prevent backflow of blood.

What is the MINIMUM amount of cells an organism must have to be considered living

• 1

• 2

• 3

• 4

Which diagram shows anaphase I?

• 
• 
• 
•