22,23 The cell membrane is often referred to as asymmetrical or "mosaic". This means thata) only certain substances can pass through the phospholipid bilayer freely,while others require the help of membrane proteins.b) both layers of the phospholipid bilayer are not identical in terms of proteintype or number and phospholipid type.c) the phospholipids of the membrane can flip-flop such that phospholipidsfrom the inner layer are exchanged with those from the outer layer. Scientists found that polypeptides that are normally synthesized in the endoplasmicreticulum are about 20 amino acids longer when they are synthesized by ribosomesnot attached to the endoplasmic reticulum. What is/are possible explanations for thegreater length of these polypeptides?a) The ribosomes that function as free ribosomes function differently than theribosomes that are attached to the endoplasmic reticulum.b) The 20-amino-acid sequence helps the endoplasmic reticulum package theseproteins for shipping to the Golgi.c) The protein has a different function in the cytosol than in the endoplasmicreticulum.d) The 20 amino acids serve as a signal sequence that directs the formingpolypeptide to the endoplasmic reticulum, where they are cleaved off duringprocessing.

The cell membrane is often described as asymmetrical because the two layers of the phospholipid…

The cell membrane is often referred to as asymmetrical or "mosaic". This means that a) only certain substances can pass through the phospholipid bilayer freely, while others require the help of membrane proteins. b) both layers of the phospholipid bilayer are not identical in terms of protein type or number and phospholipid type. c) the phospholipids of the membrane can flip-flop such that phospholipids from the inner layer are exchanged with those from the outer layer.

The cell membrane is often referred to as asymmetrical or "mosaic". This means that a) only certain substances can pass through the phospholipid bilayer freely, while others require the help of membrane proteins. b) both layers of the phospholipid bilayer are not identical in terms of protein type or number and phospholipid type. c) the phospholipids of the membrane can flip-flop such that phospholipids from the inner layer are exchanged with those from the outer layer.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: You have been given a mixture of lysine, histidine and cysteine. The isoelectric point of the amino…

A: The mixture of amino can be separated by electrophoresis technique. This method is based on pH…

Q: What type of amino acids would you expect to find in a Na+ ion channel?

A: Proteins are made up of amino acids. Proteins fold in to complex three dimensional shapes.

Q: All amino acids have two ionizable functional groups: an α‑amino group (average p?a of 9.4) and an…

A: The ionization of Aspartic acid according to the question is shown in the figure:

Q: When a dilute iodine solution is placed on a slice of bread, the solution turns dark blue because…

A: ANSWER

Q: Draw the structure of isoleucine and determine the charge on a molecule in a(n) a. Acidic solution…

A: If the pH is greater than pKa then deprotonation occurs and it exists in deprotonation form. While…

Q: 311. Which is the best binding pocket for phenylalanine? 1₂0 1₂0 protein H₂O H₂O b. protein H₂O C.…

A: A combination of molecular interactions decide the binding pocket of an amino acid in a protein.…

Q: 8. The following proteins represent a wide range of molecular weights and isoelectric points. Mr is…

Q: Arginine has ionizable groups with pKa values of 2.17, 9.04, and 12.48. A researcher makes up 73 mL…

A: From the pKa values of arginine, it can be stated that, at pH 8.5 second proton is partially…

Q: 27. Which of the following is expected to have the smallest HOMO-LUMO gap? A) HO B) HO. OH HO, C)…

A: We have to tell among the given compounds, which one is expected to have the smallest HOMO-LUMO gap.…

Q: An amino acid contains by mass: 34.28% C, 6.71% H, 13.32% N, and 45.67% O. What is its empirical…

A: Empirical Formula of amino acid is = C3H7NO3Explanation:Step 1:-We know that,Empirical Formula:-It…

Q: Make

A: According to the question, molecule C4H11N5 was the side chain of an amino acid, in a protein, we…

Q: How many kilograms of NaHCO; are needed to produce 1.00 m² (cubic meters) of CO2 gas at 2.00 atm and…

A: V = 1m3 = 1000L P = 2atm T = 45oC = 318.15K Molar mass of NaHCO3 = 84g/mol

Q: Please correct answer and don't use hand rating

A: To solve this problem, we need to calculate the enthalpy change for the decomposition of calcium…

Q: Some proteins owe their functions to the three dimensional shape they have; what contributes to…

A: using basics of 3D structure of protein.

Q: Proteins fold into complex three-dimensional shapes. The function is dependent upon the structure of…

A: Transmembrane domains consist of nonpolar amino acid residues and may traverse the bilayer once or…

Q: Which amino acid is hexagonal close packed? is it glycine?

A: Solutions- hexagonal close packed structure

Q: Phosphorus acid has three hydrogen atoms in the formula unit. How many of these hydrogen atoms are…

Q: Calculate the molecular weight of a small protein if 5.90 g sample of this protein is dissolved in…

A: P = CRTWhere, P = osmotic pressure in atm; R = 0.0821 L atm mol-1 K-1, T = temperature in K

Q: 7. How many nanomoles (nmol) are there in 3.0 µg of a 25 kDa protein? As a reminder, a Da (dalton)…

A: Given : mass = 3.0 μg = 3.0 × 10-6 g Molar mass = 25 kDa = 25000 g/mol

Q: what are two amino acids that could form a salt bridge with each other?

A: Salt bridge is interactions of amino acids which have charges opposite to each other where heavy…

Q: Tadpole Mold Trout Bear Cattails

Q: Consider the following structure CH₂ OS. H C-O CH₂ 8 HS+ Which interaction between amino acids is…

Q: Determine the oxidation states for each atom indicated in the structure of alanine below.

A: We have to find out the oxidation no of indicated atom

Q: Redraw each amino acid shown as they exist at each of the pH values below Leu, pI = 6.0 Gly, pI =…

A: Isoelectric point of amino acid is a particular pH at which amino acid remains neutral. Above…

Concept explainers

Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.

Question

22,23

The cell membrane is often referred to as asymmetrical or "mosaic". This means that
a) only certain substances can pass through the phospholipid bilayer freely,
while others require the help of membrane proteins.
b) both layers of the phospholipid bilayer are not identical in terms of protein
type or number and phospholipid type.
c) the phospholipids of the membrane can flip-flop such that phospholipids
from the inner layer are exchanged with those from the outer layer.

Scientists found that polypeptides that are normally synthesized in the endoplasmic
reticulum are about 20 amino acids longer when they are synthesized by ribosomes
not attached to the endoplasmic reticulum. What is/are possible explanations for the
greater length of these polypeptides?
a) The ribosomes that function as free ribosomes function differently than the
ribosomes that are attached to the endoplasmic reticulum.
b) The 20-amino-acid sequence helps the endoplasmic reticulum package these
proteins for shipping to the Golgi.
c) The protein has a different function in the cytosol than in the endoplasmic
reticulum.
d) The 20 amino acids serve as a signal sequence that directs the forming
polypeptide to the endoplasmic reticulum, where they are cleaved off during
processing.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1: 22) introduction

VIEW

Step 2: Reason

VIEW

Solution

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

Which factors will cause protein denaturation? ( all that applies) - small metal ions - Na+, Ca2+, Cl- - aqueous phosphate buffer - heavy metals - Hg2+, Pb2+, Ag+ -changes in pH - Tris a buffer commonly used with proteins - use of detergents or soaps
what is the product of Na2SO4(aq) + CaCl2(aq)
17. Draw the following neutral molecules and then indicate their charge and how they change when binding metal ions. Name an important protein or bioinorganic complex in which an analogue of each is found. Porphine (or porphyrin) Corrin Chlorin
Find at least four organisms that are bioluminescent.
A
Please indicate the metal oxidation state for the iron surfur protein in the picture. A) +4 B) +3 C) +2 D) +1 E) 0
DF eas fil PDF e UNOFFIC TRANSCR 59°F Mostly cloudy CH3 Classify the amino acid with the R group -CH₂-CH-CH3 according to its polarity. O polar, acidic O polar, neutral O polar, basic O nonpolar 10 4 % M LO 5 10 6 7 os hp 4+ 8
what is the role of Cu+2 ion in biuret test for proteins?