An Investigation Into the Inhibiting Effect of Tomato Juice on the Germination of Cress Seeds Introduction ============ I intend to analyse the inhibiting effect of tomato juice on the germination of tomato juice. In this introduction I will answer important questions such as; what are inhibitors? How might inhibitors affect germination? , etc. When answering the questions, I will be considering different areas of the syllabus (e.g. genetics, inter-specific competition, enzymes and inhibitors, practical skills, etc.) This will help me appreciate the theory behind the investigation and hence help me formulate an effective plan and method. Inhibitors are chemicals, which inhibit the action of an enzyme. There are two main types of inhibitors: reversible and non-reversible. Non-reversible inhibitors permanently damage enzymes. They attach themselves to the enzyme molecule and cause important bonds to break, causing irreparable damage. This denatures the enzyme and does not allow it to function. Diagram showing non-reversible inhibition: Normal arrangement Change caused by non-reversible inhibitor Reversible inhibitors inhibit the action of enzymes but do not do permanent damage. Once the reversible inhibitor is removed; the enzyme will return to normal. Reversible inhibitors can be divided into two types: competitive and non-competitive. Competitive inhibitors compete with the substrate molecules for a place on the enzyme's active site. Although enzymes are specific the inhibitors have a structure similar to the substrate molecule and so can fit into the active site. This will stop the substrate locking with t... ... middle of paper ... ... the juice of other fruit to see if they have the same effect · Disinfect the seeds before use to destroy any bacteria and mould that could affect the results · Carry out the experiment in a temperature controlled lab. · Carry out the experiment in a lab where the light intensity is monitored and kept constant · Use more reliable apparatus · Ensure the pH does not change (buffer solution) · Use more accurate measuring equipment (e.g. pipette) to reduce percentage error) · Read measurement at eye level to reduce parallax error · Give the seeds longer to germinate and hence make it easier to distinguish between seeds that have germinated and those that have not. A Level Biology coursework: An investigation into the inhibiting effect of tomato juice on the germination of cress seeds
This experiment was performed to test two hypotheses concerning the plant hormone gibberellic acid and a mutant rosette shaped phenotype of the plant Brassica rapa. This experiment was done in order to test the effects o gibberellic acid on plants and its effect on rosette shaped complexes. The two hypotheses in this experiment are as follows: Hypothesis number one states that Gibberellic acid allows for stem elongation in plants. Hypothesis number two. The rosette complex in the rosette phenotype plant contains less gibberellic acid naturally and therefore grows shorter.
Plant food is a type of fertilizer in which plants are suppose to grow taller and healthier when the food is used over a period of time. It is made up of nitrogen, phosphorus, and potassium. Nitrogen makes plants grow faster and produce more leaves, phosphorus makes the roots work better, and potassium gives larger flowers and prevents infection. The plant food contains these nutrients that are absorbed by the roots of a plant. Radishes, however, the subject of interest in this experiment is speculated by some to whether plant food actually works on it. However, for the experiment to be successful, the background information on the radish, “Early Scarlet Globe”, must be intact.
Investigation of the Concentration and the Effect of Sucrose on Osmosis in Apple and Potato Tissues
foreign boy, and his difficulty integrating into a distant society. The persimmon is a very prominent symbol in the poem; it is a very treasured fruit in China and in this piece it is used to represent the ethnic divide between Americans and Chinese people. The young boy shows signs of frustration in regards to the teacher’s ignorance about the persimmon and how the teacher does not appreciate it the same way he does. The boy is very experienced with the fruit, from determining the ripeness, how to prepare it, and how to handle it specifically. Dissimilar from those in the new society, the boy has established a connection with the persimmon from his cultural heritage
· Wear the lab coat all the time in case the acid spills on you.
Every life has a story and that story should be told no matter how small, or unimportant, or irrelevant the world may see this story, it once had a life, a voice, and deserves a listener. Stories tend to start off small and grow into something much greater such as that of a Mustard Seed. Every day a life comes and goes but do we know about this life that passed away, because just maybe that life impacted history or a person. Why should anyone care about a person who was not famous? Thurgood Marshall, Shirley Chisholm, and Barack Obama, are all important lives that most of the world knows about. So who would care about the old woman who lived for 99 years? Life is about more than just importance
Anthocyanins, flavanols, flavanones,secoiridoids, phenolic acids, stilbenes, coumarins, and isoflavones form a large class of polyphenols, which are phenolic compounds. This study, however, focuses on one category of these phenolic compounds: phenolic acids. These particular compounds have been classified into two groups, namely hydroxycinnamic acids and hydroxybenzoic acids. The most common hydroxybenzoic acids are protocatechuic acid and gallic acid, while hydroxycinnamic acids include ferulic acid, coumaric acid, caffeic acid, chlorogenic acid, and sinapic acid, (Nigdikar, Williams, Griffin, & Howard). Unlike hydroxycinnamic acids, hydroxybenzoic acids usually occur at very low levels in some black radish, red fruits, and onions, accounting for about 10 ppm on a fresh weight basis. Protocatechuic ac...
cork borer and a ruler. I will keep the potato chips the same size in
The hypothesis that a neutral environment would cause more seeds to germinate than acidic and basic environments was supported. Some possible errors in the experiment were that the papers were not dampened again and the temperature on the windowsill may have been too cool. To extend the experiment, multiple trials can be conducted and warm environments versus cooler environments could be
Janick. J. (2011). Center for New Crops & Plant Products - Department of Horticulture and
repeat the process 3 times in total to ensure a fair test. At the end
Plant defences are those mechanisms employed by plants in response to herbivory and parasitism. According to Hanley et al. (2007), “the tissues of virtually all terrestrial, freshwater, and marine plants have qualities that to some degree reduce herbivory, including low nitrogen concentration, low moisture content, toxins or digestibility-reducing compounds”. The type of chemical defence may be species specific (Scott 2008). The defences that plants possess may be in the form of chemical production or in the form of physical defences such as thorns or spikes and even through reinforced, rigid leaves. “The compounds that are produced in response to herbivory can either have a direct effect on the attacker itself (e.g. toxins or digestibility reducers), or serve as indirect defenses by attracting the natural enemies of the herbivores” (Bezemer & van Dam 2005). This essay will focus on chemical plant defences and in particular the effects of terpenes, phenolics, nitrogen-based defences as well as allelopathy in plants.
Introduction: In our experiment we studied the effects of Miracle Gro 1x on 10 Phaseolus vulgaris beans (Bush Beans). We wanted to find out if Miracle Gro 1x would help the seeds Germinate faster than water.
Cultivation of Grapes The process involved in the cultivation, production and science of Grapes is called Viticulture. Grape cultivations one of the oldest cultivation in mankind after grains, that dates back to 7000 years during the Neolithic period. Viticulture originated from the Mediterranean region & spread across Middle East & Asia & gradually to the world. It’s in the records that the 1st grape harvest occurred 5400 B.C in region where present day Georgia & Armenia countries are called.
In seedless watermelons, rudimentary seed structures form but remain small, soft, white, tasteless and undeveloped tiny seed coats that are eaten virtually undetected along with the flesh of the melon. Seed production for these seedless types is an extremely labor intensive process that makes the seeds relatively expensive. Because germination of these types is often less vigorous than normal types, it is recommended that they be started in peat pots or other transplantable containers. Here the germinating conditions can be closely controlled. Once transplanted, cultivation is similar to that for regular watermelons.