Northern Arizona University

1. Which of the following ate true concerning monomeric GTPases such as Ran, Rab and Sar1? a. arresting locks them in a dimeric GTP bound configuration b. they are converted from the inactive form to the active form by the dephosphoylation of the a subunit of GPCR c. they contain a, s and D subunits that associate together when activated d. the conversion from the inactive the GDP bound to the active GTP bound form is accomplished through appropriate GEFs e. they are inhibited through the a...

How do proteins get moved between the nucleus and the cytosol? - Answer By nuclear pore complex. Small molecules can move across the pores via gated transport. Large molecules are shuttled across via active transport. Nuclear import receptors bind to nuclear signal sequence. RAN-GTP provides energy for active transport, but smaller protein will freely diffuse. What are nuclear pore complexes? - Answer Proteins that actively transport proteins out of the nucleus. What is a nuclear imp...

which of the following will spontaneously form bilayer when placed in an aqueous environment - Answer phospholipids the "self-assembly" of membrane lipids into bilayers is driven by - Answer non-covalent forces which of the following are a function of lipid rafts - Answer organize and concentrate membrane proteins to enable them to function together cell membranes contain all of the following except - Answer single stranded DNA which of following types of enzymes wo...

How do proteins get moved between the nucleus and cytosol - Answer Nucleus- Gated transport Mitochondria- trans membrane transport ER- trans membrane transport then to vesicle transport to get to golgi What are nuclear pore complexes (NPC) - Answer Large structure that perforate the nuclear envelope and transports macromolecules bidirectionally in ER What is a nuclear import receptor - Answer initiates nuclear import, cytosolic proteins that bind the signal on the protein to be...

What are the differences between microtubules, intermediate filaments and actin filaments? - Answer Actin: smallest filaments of the cytoskeleton. Intermediate: are responsible for strength and are the strongest of the three. Microtubules: widest, largest, and thickest of the three. What is each type of filament made of? - Answer All filaments are made of subunits! Actin: made of actin protein subunits Intermediate: many different kinds of subunits can make up the interm...

Which of the following differentiates between rough ER and smooth ER? A. the presence of ribosomes in the rough ER B. the rough ER contains only sphingolipids while smooth contains only phosphoglycerides C. the rough ER contains TOM while smooth ER contains SAM D. the absence of saturated fats in the smooth versus rough ER E. Phospholipase C and PI3-Kinase are only active in the smooth ER - Answer The presence of ribosomes For N-linked glycoproteins, ___________ is the site where a 14...

1. Describe the cell cycle including the different phases that occur during mitosis - Answer -The cell cycle is the cells way to grow and divide to make new cells. It contains interphase which consists of G1, S, and the G2 phase. -It also consists of Mitosis which is the M phase. 2 distinct divisions occur during the M phase: -Mitosis: when the nuclear DNA of the cell condenses to visible chromosomes and are pulled apart by the mitotic spindle (MADE OF WHAT?). Mitosis takes place in four ...

The cell cycle is the cells way to... - Answer Grow and divide to make new cells The cell cycle contains interphase which consists of... - Answer G1, S, and the G2 phase The cell cycle also consists of mitosis which is the... - Answer M phase What two distinct divisions occur during the M phase? - Answer -Mitosis -Cytokinesis Mitosis - Answer -The nuclear DNA of the cell condenses to visible chromosomes -The chromosomes are pulled apart by the mitotic spindle What...

What are the differences between microtubules, intermediate filaments and actin filaments? - Answer -Growing microtubule has GTP containing tubulin subunits at its end. When cap is hydrolyzed (GTP-GDP), it will begin to go through a shrinking phase. They are responsible for the transportation system to proteins/and aid in cell division -Intermediate Filaments: can withstand high deformation force, and are highly elastic. They are responsible for holding cells attached to each other and keepi...

EPS 525 Module 1 Exam Questions and Answers|2025 Update| 100% Correct.