Biology EUEE 2007 E.C Grade 11 Unit Five

When athletes take part in short distance running, how do the cells generate most of the energy that is quickly needed?

Cells immediately used the energy that electrons lose as they pass along the chain of electron carriers to:

• Pump protons

• reduce NAD

Which of the following happens in both cyclic and non-cyclic photophosphorilation?

• ATP is formed

• NADP is reduced

• Oxygen is generated

• Water molecule splits

Which of the following is NOT true about C4 plants such as tef (Eragrostistef)?

• CO₂ is harvested during the night time

• The bundle sheath cells contain chloroplasts

• Light-dependent reaction occurs in mesophyll cells

• Chloroplasts of bundle sheath cells lack thylakoids

Which of the following classes of organic molecules is the least important source of energy for cellular respiration?

• Nucleic acids

• Lipids

• Carbohydrates

• Protein

What is the molecule that supplies the quickest and suitable sources of energy to cells?

• Lactose

• Sucrose

• ATP

• Lipid