Cell Biology Exam #2 el\'s memorane is pierced, the membrane (c) expands (d) a t

Question

Cell Biology Exam #2 el's memorane is pierced, the membrane (c) expands (d) a tear is formed ich type of lipids are the most abundant in the (b) phospholipids ob glycoli The presence of phospholipids with decreased mber of double bonds will membrane (a) decrease (c) have no .1n eukaryotic cells, most new membrane (3) synthesis take place at (c) plasma membrane (a smooth Golgi apparatus (d) endosome 5. Which of the following membrane proteins is expected to be mobile cell membrane? (a) anchors (c receptors (b) channels 6 Which of the following substances is most commonly used (a) high salt solution (c) ethanol (b) sucrose (d) detergent 7. Diversity among the oligosaccharide chains found in the carbohydrate coating of the cell surface can be achieved in which of the following (a) varying the types of sugar monomers used (b) varying the types of linkages between sugars (c) varying the number of branches in the chain (d) all of the above 8. The molecule that is more likely to cross the phospholipid bilayer by simple diffusion. (a) amino acids (c) glucose (b) Cl (d) 02 9. Which of the following ions is the most abundant inside a typical mammalian cell? (a) Na (c) Ca2 (b) CIT (d) K 10. Which of the following best describes the behavior of a gated channel? (a) It stays open continuously when simulated. frequently in response a it opens more given stimulus. no (cit opens more widely as the stimulus i becomes stronger. (d) It remains elosed if unstimulateda 11. Transporters, in contrast to channels, work by (a) specific binding to solutes qu too ob (b) a gating mechanism (e) filtering solutes by charge (d) filtering solutes by size u moil 12. The movement of solutesacross membranes. against their concentration gradient is called (a) active transport (c) facilitated diffusion (b) free diffusion (d) pasive transport 13. Which of the following is nofone of the common ways to perform active transport? (a) K (b) Na-coupled 14. In transport vesicles, clathrin protein interacts (a) dynamin (b) cargo receptor (b) (d)SNAREs ed) 15. The signal sequences on mitochondrial proteins are usually located at the N-terminus. Rio (b) false 16. Which of the following is required for the secretion of neurotransmitters in response to an (a) (b)Na -K pumps (c) (d) voltage-gated Ca channels 17. What type of neurotransmitier is used at the (a) glycine (c) GABA (b glutamate (d) acetylcholine 18. What type of gating mechanism do the auditory (a) (c) (b) ligand-gated (d) 19. Which of the following protein families are not involved in directing transport vesicles to the

Explanation / Answer

ANSWERS:

1) cell membrane is pierced,the membrane

a) reseals

2)Which type of lipids are the most abundant in the plasma membrane

(a) phospholipids

3)the presence of phospholipids with decreased number of double bonds will - membrane

a)decreased

4)In eukaryotic cells most new membrane synthesis take place in the

a) smooth ER

5)which of the following membrane proteins is expected to be the least motile on cell membrane

a) anchors

6)Which of the following substances is most commonly used to help purify a membrane protein

d)detergent

7)Diversity among the oligosaccharide chains found in the carbohydrate coating of the cell surface can be achieved in which of the following ways

d) all of the above

8)The molecule that is more likely to cross the phospholipid bilayer by simple diffusion

(d)o2

9) Which of the following ions is the most abundant inside a typical mammalian cell

d) K+

10)Which of the following best describes the behavior of a gated channel

b) It opens more frequently in response to a given stimulus.

11)Transporters, in contrast to channels, work by

a) specific binding to solutes.

12)the movement of solutes across membranes, against their concentration gradient. This type of transport is called

a) active transport.

13)Which of the following is not one of the common ways to perform active transport

a) K+-coupled

14)in the transport vesicles clathrin protein intracts directly with

b)cargo receptors

15)he original sequence of mitochondrial proteins are usually located at the N- terminus

(a)true

16)Which of the following is required for the secretion of neurotransmitters in response to an action
potential?

(d)Voltage-gated Ca2+ channels .

open in response to the depolarization caused as the
action potential moves toward the nerve terminal. The influx of calcium from outside the
cell causes the synaptic vesicles to fuse with the plasma membrane and release large
amounts of neurotransmitter into the synaptic cleft.

17)What type of neurotransmitter is used at these neuromuscular junctions?

(d)acetylcholine

18)what type of gating mechanism do the auditory nerve cells use?

(d)stress-gated

19) Which of the following protein families are not involved in directing transport vesicles to the target membrane?

adaptins.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.