LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
11th Edition
ISBN: 9781319209957
Author: Sadava
Publisher: MAC HIGHER
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Chapter 25, Problem 2Q
Summary Introduction
To review:
The bacteria, which are most appropriate to use in therapy for curing the tumor.
Introduction:
Cancer is the condition of abnormal and uncontrollable growth of the cells. Treatment of cancer includes surgery and different kinds of therapy, such as chemotherapy and radiotherapy. All these methods have limitations and severe side effects. To overcome these limitations, medical field started using certain bacteria to treat solid tumors.
The table given below gives details of characteristics of four bacteria.
| Name of Bacteria | Clostridium novyi | Thermus aquaticus | Paracoccus denitrificans | Trichodesmium thiebautii |
| Characteristics | ||||
| Obligate anaerobic | Obligate aerobic | Facultative anaerobic | Facultative anaerobic | |
| Gram status | + | – | – | – |
| Optimal temperature (°C) | 10–40 | 50–80 | 5–30 | 10–30 |
| Typical habitat | Terrestrial | Aquatic | Aquatic | Aquatic |
| Miscellaneous | Chemotroph | Denitrifier | Nitrogen fixer |
°C, Degree Celsius: (+), positive; (–), negative.
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The Snapdragon is a popular garden flower that comes in a variety of colours, including red, yellow, and orange. The genotypes and associated phenotypes for some of these flowers are as follows:
aabb: yellow
AABB, AABb, AaBb, and AaBB: red
AAbb and Aabb: orange
aaBB: yellow
aaBb: ?
Based on this information, what would the phenotype of a Snapdragon with the genotype aaBb be and why?
Question 21 options:
orange because A is epistatic to B
yellow because A is epistatic to B
red because B is epistatic to A
orange because B is epistatic to A
red because A is epistatic to B
yellow because B is epistatic to A
A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
Chapter 25 Solutions
LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
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