alleryC4 plants lack photorespiration because
APhotorespiration is light-dependent only
BC4 plants have no light reactions at all
CBundle sheath cells concentrate CO2 around RuBisCO
DRuBisCO is absent in C4 plants altogether
Answer & Solution
Correct answer: C. Bundle sheath cells concentrate CO2 around RuBisCO
C4 plants use PEP carboxylase in mesophyll to grab CO2 and shuttle it as malate/aspartate to bundle sheath cells, where it is released as concentrated CO2 around RuBisCO.
High CO2:O2 ratio suppresses oxygenase activity.
Keep practising Unit 8L: Biomes, Primary Productivity & Ecosystem Energetics
Browse all Unit 8L: Biomes, Primary Productivity & Ecosystem Energetics questions for AP Biology, or explore more Biology topics.
Related questions
Different amino acids differ from one another in their:Nucleic acids such as DNA and RNA are polymers of:Enzymes are best described as:The chemical bond that links amino acids together in a protein is the:Proteins are polymers made up of:The simplest amino acid, whose R group is a hydrogen atom, is:In a monocot (grass) embryo, the cotyledon is called the:In a dicot embryo, the portion of the embryonal axis above the level of cotyledons is the: