Becker's World of the Cell (9th Edition)
Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Chapter 3, Problem 3.12PS

(a)

Summary Introduction

To determine: Two examples of enzymes with their importance and presence in the cell.

Introduction: Enzymes are specific proteins which function as catalysts to perform special reactions in the body. Enzymes can alter the rate of chemical reaction Enzymes are used to perform various metabolic reactions in the human body.

(b)

Summary Introduction

To determine Two examples of structural proteins with their importance and presence in the cell.

Introduction: Structural proteins help in maintaining the structure of membranes responsible for performing different functions in the body. Most of the structural proteins are fibrous in nature.

(c)

Summary Introduction

To determine Two examples of motility proteins with their importance and presence in the cell.

Introduction: Motility proteins are responsible for locomotion and movement in the body. Motility proteins help in the process of contraction and relaxation of muscles. Motility proteins also help in the transport of substances within the cell.

(d)

Summary Introduction

To determine Two examples of regulatory proteins with their importance and presence in the cell.

Introduction: Regulatory proteins form an important component of different systems of the body. These proteins help in regulating different types of movements contributing to the metabolism of the human body. Regulatory proteins generally comprise of transcription factors.

(e)

Summary Introduction

To determine Two examples of transport proteins with their importance and presence in the cell.

Introduction: Transport proteins help in the transfer or movement of various products in and outside of the cell. Transport proteins require energy in the form of ATP (Adenosine Triphosphate) for the movement of substances.

(f)

Summary Introduction

To determine Two examples of receptor proteins with their importance and presence in the cell.

Introduction: Receptor proteins are present on the surface of different cells. These receptors help in acquiring the signal and generating a response either against or in favor of the cell.

(g)

Summary Introduction

To determine Two examples of defensive proteins with their importance and presence in the cell.

Introduction: Defensive proteins help in protecting the body from various infection and injuries. These proteins help in eliciting a strong defense response against the disease-causing microorganisms.

(h)

Summary Introduction

To determine: Two examples of storage proteins with their importance and presence in the cell.

Introduction: Storage proteins are the source of amino acids and metal ions which can be used by an organism in later stages of life. These proteins are important components of the cell which are generally used when the body is deficient in that particular protein.

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Question #5: Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The genes show independent assortment. Recessive alleles at both loci are required for the facultative apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C. At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype. A facultative apomict male, capable of producing viable pollen, was crossed with a sexually reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following temperatures*: a) 15°C? b) 25°C? *for full credit, show crosses and genotypes where appropriate. Remember to position the female first (left side) in the cross. Type your answer here:
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