2nd exam - key - Bio 20A Second Exam - Fall 2008 1. Which...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Bio 20A – Second Exam -- Fall 2008 1. Which best describes the type of transport protein called a “channel”? a. gets energy from ATP >>>b. behaves like a pore with a gate across the membrane c. transports molecules one at a time d. unlike “carriers” is not specific for transporting one type of molecule e. can work against the electrochemical gradient 2. One of the differences between plant cells and animal cells is: >>>a. plant cells often have a large central vacuole b. only animal cells have a nucleus c. only plant cells have centrioles d. animal cells have an endomembrane system e. only animal cells have actin and myosin 3. Which of the following organelles is enclosed by a double membrane? a. Golgi b. ER >>>c. nucleus d. lysosome e. transport vesicle 4. Ribosomes are made of protein and RNA. Where in the cell are these components put together to form new ribosomes? a. in the chromatin >>>b. in the nucleolus c. on the surface of the ER d. in the cytosol e. in the Golgi 5. Which of the following organelles is the major site of lipid synthesis? a. Golgi >>>b. ER c. nucleus d. lysosome e. transport vesicle 6. Glycosylation of proteins takes place in which organelle or organelles? a. the nuclear envelope and the ER >>>b. the ER and the Golgi c. the Golgi and the lysosome d. in the lysosome e. in the transport vesicles. 7. Kinesin is usually associated with which of the following proteins? >>>a. tubulin b. keratin c. myosin d. actin e. flagellin 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8. The movement of cilia is caused by a molecular motor named: a. kinesin >>>b. dynein c. myosin d. keratin e. actin 9. How does an enzyme change the rate of a reaction? a. by changing the equilibrium to favor products b. by changing the free energy of the reaction c. by binding to the substrates but not the products >>>d. by lowering the activation energy of the reaction e. by blocking the conversion of products back to substrates 10. What are the products of glycolysis? >>>a. NADH, ATP, pyruvate b. NAD + , ATP, pyruvate c. NADH, ATP, pyruvate, CO2 d. ethanol, NADH, CO2 e. ATP, H2O, CO2 11. What is the first step in the Krebs cycle? a. pyruvate + CO2 -> acetyl-CoA b. pyruvate -> acetyl-CoA + CO2 c. citrate -> succinate +CO2 d. OAA + citrate -> succinate >>>e. acetyl-CoA + OAA -> citrate 12. If you add an “uncoupler” to mitochondria that are making ATP it will inhibit ATP synthesis. What is the effect of adding the uncoupler?
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/24/2009 for the course BIO bIO taught by Professor Bowman during the Winter '07 term at École Normale Supérieure.

Page1 / 6

2nd exam - key - Bio 20A Second Exam - Fall 2008 1. Which...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online