StudentShare solutions
Triangle menu

Microbial Physiology - Essay Example

Not dowloaded yet

Extract of sample
Microbial Physiology

This lag phase needed for organism to switch over to new carbon source (lactose).
Utilization of glucose and lactose is tightly regulated at gene level. All the genes which are necessary for lactose utilization are arranged in sequence called Lac operon which is regulated by catabolic repression. The following events happen during overall process.
-High level of glucose leads to higher energy production and hence higher ATP and lower AMP. In this scenario there is no free cAMP which binds with CAP( activator protein which facilitates RNA polymerase binding to promoter of Lac operon)and hence there is no expression of the downstream genes.
-In case of lactose, there is high level of cAMP which binds with CAP and induces the expression of Lac operon. Similarly allolactose binds to repressor protein and inhibits its binding to operator site leads to expression of lac operon.
b) Here if we closely look at the data and compare the viable count of aerobic culture it indicates reduction of 1.3X105 cfu/ml when bottle heated at 80C for 10 min. Similarly, for untreated bottle anaerobic viable count is 1.22X105 cfu/ml and if heating have similar effect than there will be complete killing of anaerobic bacteria and we will not get any viable count. ...Show more

Summary

Glucose is preferred over lactose for growth and metabolism, as it is clearly indicated in data the activity of -galactosidase induced after 10 h of growth. At this time -galactosidase will cleaved lactose to make glucose. E.coli prefers glucose over lactose and start utilizing glucose in initial stage…
Author : evie58
Microbial Physiology essay example
Read Text Preview
Save Your Time for More Important Things
Let us write or edit the essay on your topic
"Microbial Physiology"
with a personal 20% discount.
Grab the best paper

Related Essays

Applied Anatomy and Physiology (Case Study)
This discipline for a couple of centuries has been closely linked to medicine. In contrast to the fields of anatomy, structural biology and anatomy which primarily focus on morphology, physiology is tightly related to these fields. This is because morphology and functions of the organ systems and cells function in tandem interchangeably.
12 pages (3000 words) Essay
Microbial physiology and genetics
For one to model and follow the microbial evolution inside a chemostat, different parameters are required to give identification of the direct evolution extent given a high time of resolution. This worked as parameters that are convenient for monitoring the population evolution in at a high-resolution time in regards to its affinity.
6 pages (1000 words) Essay
Microbial physiology and genetics
The use of DNA microarrays in characterising the whole genome expression has been instrumental in the provision of a picture of the genome of an organism in action, which reveals thousands of genes in action at a time. A 1997 study by Derisi et al. used DNA microarrays to follow the process through which yeast cells naturally transitioned from their stage of fermentative metabolism to the final stage of respiration in order to study the changes in gene expressions on a global level.
7 pages (1750 words) Essay
Microbial physiology and culture (Practical Oxygen Transfer in a Stirred Tank Reactor)
To determine KLa, two methods can be used; these are fermentative and non – fermentative (Ochoa, 2001). In non – fermentative method also known as dynamic gassing out, the concentration of oxygen is lowered by gassing the liquid out using nitrogen gas resulting in the initiation of at constant air flow rate at the same time increasing dissolved oxygen (Mohamed, 2009).
6 pages (1500 words) Essay
Physiology
15 Symonds, ME and Ramsay, MR 2010, Maternal-Foetal Nutrition during Pregnancy and Lactation, Cambridge University Press, Cambridge. 15 OUTLINE 1. INTRODUCTION 2. PHYSIOLOGY OF NORMAL PREGNANCY a. Prenatal development b. Uterine changes c. Placental development and function 3.
8 pages (2000 words) Essay
Protein Translocation
The composition of the translocation pore, and the organisation of the central component of the pore show how nascent polypeptides are directed towards the pore and then exit through it. This will shed light on understanding target pathways and how these target pathways contribute to the overall translocation of proteins across the ER membrane.
4 pages (1000 words) Essay
Dissection of a Protein Transporter
The composition of the translocation pore, and the organisation of the central component of the pore show how nascent polypeptides are directed towards the pore and
4 pages (1000 words) Essay
Microbial physiology and culture (Practical Oxygen Transfer in a Stirred Tank Reactor)
This allows meeting the necessary the metabolic demands of aerobic microorganisms. In this process, air is passes through a reactor at a constant flow rate at given speed in revolutions per minute. Polarographic system is used to measure dissolved oxygen. In this
6 pages (1500 words) Essay
Physiology
This is to ensure that differences in temperature between the environment and the skin remain constant thus preventing heat loss and attaining a constant temperature (Yagiela, 1995). When sick, body temperature rises to about 20
2 pages (500 words) Essay
1) Describe the physical and chemical requirements for microbial growth and: a. The industrial production of Yogurt. b. The role of microbes in the nitrogen cycle. c. The role of microbes in the spoilage of jam. Everyone does a. and b. and c. 2) P
Mineral elements include carbon, nitrogen, sulfur, phosphorous, oxygen, and trace elements. Carbon is the main source of energy in microbes and can be obtained from carbohydrates, fats, lipids, or proteins (Chaudhary,
4 pages (1000 words) Essay
Get a custom paper written
by a pro under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email
YOUR PRIZE:
Apply my DISCOUNT
Comments (0)
Rate this paper:
Thank you! Your comment has been sent and will be posted after moderation