BIOCHEMISTRY (LOOSELEAF)-W/ACCESS
BIOCHEMISTRY (LOOSELEAF)-W/ACCESS
9th Edition
ISBN: 9781319425784
Author: BERG
Publisher: Macmillan Higher Education
Question
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Chapter 31, Problem 47P
Interpretation Introduction

(a)

Interpretation:

Effects on eIF-4 helicase activity in the presence of eIF-4H should be determined.

Concept introduction:

Eukaryotic initiation factors (eIFs) are the proteins, which are used during the initiation of the eukaryotic translation process. The function of these proteins is to stabilize the ribosomal complexes that are near the start codon on the mRNA strand.

Interpretation Introduction

(b)

Interpretation:

The importance of measuring the helicase activity of eIF-4H as control should be determined.

Concept introduction:

Eukaryotic initiation factors (eIFs) are the proteins, which are used during the initiation of the eukaryotic translation process. The function of these proteins is to stabilize the ribosomal complexes that are near the start codon on the mRNA strand.

Interpretation Introduction

(c)

Interpretation:

The ratio of eIF-4H and eIF-4 should be determined to attain optimal activity.

Concept introduction:

Eukaryotic initiation factors (eIFs) are the proteins, which are used during the initiation of eukaryotic translation process. The function of these proteins is to stabilize the ribosomal complexes that are near the start codon on the mRNA strand.

Interpretation Introduction

(d)

Interpretation:

The varying effect f eIF-4H with helix stability should be determined.

Concept introduction:

Eukaryotic initiation factors (eIFs) are the proteins, which are used during the initiation of the eukaryotic translation process. The function of these proteins is to stabilize the ribosomal complexes that are near the start codon on the mRNA strand.

Interpretation Introduction

(e)

Interpretation:

The effect of eIF-4H on the helicase activity of eIF-4A should be determined.

Concept introduction:

Eukaryotic initiation factors (eIFs) are the proteins, which are used during the initiation of eukaryotic translation process. The function of these proteins is to stabilize the ribosomal complexes that are near the start codon on the mRNA strand.

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1. (10 points) Pulverized coal pellets, which may be ° approximated as carbon spheres of radius r = 1 mm, are burned in a pure oxygen atmosphere at 1450 K and 1 atm. Oxygen is transferred to the particle surface by diffusion, where it is consumed in the reaction C + O₂ →> CO₂. The reaction rate is first order and of the form No2 = k₁C₁₂(r), where k₁ = 0.1 m/s. Neglecting changes in r, determine the steady-state O₂ molar consumption rate in kmol/s. At 1450 K, the binary diffusion coefficient for O2 and CO2 is 1.71 x 10ª m²/s.
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