Explain the role of salts in the coagulation of eggs mixtures Explain the role of acids in the coagulation of eggs mixture

Write the formulas and provide the associated name for each formula for the four acids that contain oxyanions of bromine.

Discuss effects of structure and of the medium on the strengths of acids and bases. Use examples to illustrate your explanation.

a few words, your own, about proteins, nucleic acids, lipids and carbohydrates. (small paragraph).

What is the function of B-ketoacyl-ACP synthase (KS) in biosynthesis of fatty acids? What is the mechanism?

Instrumental Analysis:

Amber is an excellent source of preserved ancient organisms. Many bacteria remain dormant inside insects trapped in the amber and may be extracted, cloned and studied. Since the amber may be dated using geological methods, such investigations are a valuable source of ancient genetic information for biologists. Suggest a method that will permit the determination of metabolic products such as nucleic acids, short peptides and fatty acids obtained from cloned ancient bacteria. State any special instrument conditions or configuration.

1)Which of the following is FALSE regarding lipids?

Select one:

a. They often are polymers of fatty acids

b. They have a low oxygen to carbon content

c. They are nonpolar molecules

d. They are used solely as fuel for the body

e. They include cholesterol molecules

2) Trans fat

Select one:

a. Contribute more to cardiovascular disease than cholesterol does

b. Lower the LDL in our bodies

c. Are a form of cholesterol

d. Dissolve in water

e. Are saturated fatty acids

1. Given the following fatty acids: Caproic Acid, Valeric Acid, Stearic Acid, Oleic Acid, Arachidonic Acid, Palmitic Acid, Cerebronic Acid, Timnodonic Acid and Cervonic Acid.

1a. Group them into saturated and unsaturated fatty acids. Identify the number of

carbons and number of double bonds, if present. Give their biochemical name.

1b. Arrange them based on their melting point, from lowest to highest.

1c. Which will you select as constituents of the cell membrane? Why?

1. Write a balanced chemical equation:

1. Solid lead(II)sulfide reacts with aqueous HCL to form lead(II)Chloride and dihydrogen sulphide gas
2. Solid lithium oxide reacts liquid water to form aqueous lithium hydroxide
3. Chlorine gas reacts with aqueous potassium iodide to form solid iodine and aqueous potassium chloride.
4. Gaseous dinitrogen pentoxide decomposes to form nitrogen dioxide gas and oxygen gas
5. Gaseous carbon monoxide reacts with hydrogen gas to form gaseous methane (CH₄ )and liquid water

2. Balance the equation:

H₂(g) + N₂(g) →NH₃(g)

HCl(aq) + O₂(g) →H₂O(l)+Cl₂(g)

H₂ (g) + Cl₂(g) →HCl(g)

3. Write complete ionic and net ionic equations and identify spectator ions and type of reaction:

1. AgNO₃(aq) + KCl(aq) →AgCl(s) + KNO₃(aq)
2. CaS(aq) +CuCl₂(aq) →CuS(s) +CaCl₂(aq)
3. Na₂SO₄(aq) +CaI₂(aq) →CaSO₄(s) +2NaI(aq)

4. What is false about acids and bases:

Acids turn litmus blue                               bases turn litmus blue

Aids produce H+                                         Bases produce H+

Acids are sour to taste                              bases are bitter to taste

Acids are corrosive                                    bases are soapy in texture

1. Steel tapes must be maintained and checked regularly for damages such as kinks and breakages. If a damaged steel tape is used for measurements describe the type of error(s)that would be observed. (0.5marks)

2. To meet the tolerance required for a surveying project, it is necessary to use a total station. An obstacle makes it impossible to obtain a direct line of sight. Explain one technique that you would use to establish the line of sight past the obstacle. Use a sketch if necessary (0.5marks)

3.Watch the video below which demonstrates the process of transferring levels or elevations.

https://www.youtube.com/watch?v=hAN9SAR7RZ4a.

a.Identify all the safety precautions taken by the survey crew.(1 mark)

b.The lead surveyor describes at least four challenges that the survey crew had to overcome during the survey process. Identify these challenges, and describe the errors associated with them. (1 mark)

c.Identify all activities performed by the survey party to ensure accuracy. Classify these activities according to the categories outlined in the Guidelines for Accurate Surveying. (3marks)

4.A surveyor completes a levelling circuit from a known BM at point A ( RL = 37.730 m). At the end of the survey, the surveyor finds out that the rod person moved the graduated staff before a BS value was taken at the third change point. The levels obtained are as follows: 1.857 ( RL = 37.567 m), (0.983, 0.354), 0.571, 1.011, 2.151, (1.124, x), 0.890, (0.543, 3.178), 3.808.

a.Assuming that the misclosure for the level circuit is 0.000 m, find the probable value of the missing BS value x.(2marks)

b.Is the value of x in part (a) acceptable? Explain.(1mark)

c.Book the levels, including the value of x calculated in part (a) using the HPC method and show all arithmetic checks. (1mark)

5.A surveyor conducted a cadastral survey of a property outlined by survey pegs at points A, B, C and D.The total station was used to measure the length of lines AB and DA however due to battery failure, lines BC and CD were measured using asuspended30-metre steel tape. The measurements obtained are given in the table below:

a.If the tape was standardised under a tension of 50 N at 20°C, apply the necessary corrections and compute the actual length of lines BC and CD.(1mark)

b.It is known that angle DAB is 102°15′40′′. After the survey, it is observed that the total station at point A is off the survey peg, coinciding with a point A′such that angle DA′B is 102°26′42′′. Find the length of distance AA′.(2mark)

c.Determine the actual length of lines AB and DA. (2marks)

Take:

Gravitational acceleration,g= 9.81 m/s2

Cross-sectional area of the tape, A= 3.15 mm2

Mass of the tape, m= 0.02 kg/m

Coefficient of linear thermal expansion, K= 0.9 × 10–6per °C

Young’s modulus, E= 14.8 × 104MN/mm2