Both methionine and cysteine contain Sulphur atoms and may combine to form disulfide bridges? T/F Both...

Both methionine and cysteine contain Sulphur atoms and may combine to form disulfide bridges? T/F

Both transcription and translation require primers for them to occur T/F

The conversion of acetyl CoA to malonyl CoA is the commitment step for β-oxidation. T/F

Solutions

Expert Solution

Ans:- False. Cysteine contains sulphur atoms and forms disulfide bridge because it contains the thiol group (S-H) which can easily form S-S (disulfide bidges) between two cysteine residue present in same polypeptide (intramolecular disulfide bond) or present in two different polypeptide chain (intermolecular disulfide bond). In contrast if you look at the structure of methionine you will find that sulphur is bonded by CH3 group, which is not a thiol group. Secondly, S-CH3 is very stable means sulphur in this state is not free to form disulfide bond. Thus, cysteine forms disulfide bridges whereas methionine cannot from inspite of presence of sulphur group because of lack of free sulphur group.

Ans:- False. Transcription and translation don't require pimer at all. Primers are the short stretch of nucleotides synthesized by an enzyme primase. Primers are required for DNA polymerase during DNA replication as DNA polymerase can add the nucleotide only when free 3' OH group is present. In case of transcription,when RNA polymerase copy the mRNA from DNA it does not need primer at all, because RNA polymerase can start transcription without the presence of 3' OH group. In case of translation, mRNA is translated into proteins where there is no use of primers and all.

Ans:- False. Conversion of acetyl CoA to malonyl CoA is not a commited step of beta oxidation. The conversion of acetyl CoA to malonyl CoA is the commited step during the fatty acid synthesis when acetyl CoA carboxylase add one carboxyl group to acetyl CoA. Beta oxidation is the breakdown of long chain of fatty acid to produce acetyl CoA that will channelize to kreb cycle for production of ATP.

Dear student if you find the answer convincing please do give the feedback.

gladiator answered 1 year ago

Next > < Previous

Related Solutions

1.Two hydrogen atoms can combine to form H2 but two He atoms cannot form He2 —...

1.Two hydrogen atoms can combine to form H2 but two He atoms cannot form He2 — Justify from MO viewpoint. 2.Ethyl benzene is treated with (i) Br2 and FeBr3 and (ii) Br2 and light or heat separately. Do you think the products will be same? Justify your answer. 3.The double bond in cyclohexene can be oxidized by potassium permanganate (KMNO4), whereas the double bonds in benzene do not undergo this oxidation reaction — Justify.

(a) Just like the familiar liquid solutions, two metal ions or atoms combine to form solid...

(a) Just like the familiar liquid solutions, two metal ions or atoms combine to form solid solution. What are substitutional solid solutions and interstitial solid solutions? Explain with examples and sketches. (b) How well the solid atoms combine to form solid solutions depends on how many of the Hume-Rothery rules have been violated or not violated. Describe Hume-Rothery rules?

Find the function of the form f(t) = c0 + c1sin(t) + c2cos(t) + c3sin(2t) +...

Find the function of the form f(t) = c0 + c1sin(t) + c2cos(t) + c3sin(2t) + c4cos(2t) that best fits the data points (0,0), (0.5,0.5), (1,1), (1.5,1.5), (2,2), (2.5,2.5), (3,3), using least squares. Sketch the solution, together with the function g(t) = t.

Find the function of the form f(t) = c0 + c1sin(t) + c2cos(t) + c3sin(2t) +...

For each of the following integrals find an appropriate trigonometric substitution of the form x=f(t)x=f(t) to...

For each of the following integrals find an appropriate trigonometric substitution of the form x=f(t)x=f(t) to simplify the integral. the inteagral a) ∫x(3x^2+30x+73)^(1/2)dx b)∫x/(−25−3x^2+18x)^(1/2)dx

Label T/F micro-RNA: (only one may be true) T/F: pathway uses Drosha, but not RISC or...

Label T/F micro-RNA: (only one may be true) T/F: pathway uses Drosha, but not RISC or Dicer. T/F: they are encoded by cellular genes. T/F: pathway uses Drosha, RISC and Dicer T/F: they are encoded by cellular genes and microRNA pathway uses Drosha, RISC and Dicer. T/F: they are encoded by cellular genes and microRNA pathway uses Drosha, but not RISC or Dicer.

18) Which of the following describes enhancers? They may contain binding sites for both activators and...

18) Which of the following describes enhancers? They may contain binding sites for both activators and repressors They regulate gene expression in prokaryotes They can only be located upstream of the coding sequence of a regulated gene. they only work if an insulator is located between the enhancer and its regulated gene all of the above 20) A single-base change occurs in the 5' splice site of a gene, resulting in a loss-of-function mutation. Scientists have found a suppressor mutation:...

1. Implement the Explicit Euler Scheme for Initial Value Problems of the form: y'(t) = F(t,...

1. Implement the Explicit Euler Scheme for Initial Value Problems of the form: y'(t) = F(t, y(t)) , t0 ≤ t ≤ tend y(t0) = y0 The function F(t,y) should be coded in a function subprogram FCN(...). Input data: t0, y0, tend, Nsteps. Thus the time-step will be h=(tend-t0)/Nsteps. Your code should print out the input data and then the pairs: tn Yn At the end, it should print out the final n, tn, Yn (appropriately labelled, of cource). 2....

A signal has the functional form f(t) = 5sin(40πt) and is sampled at a rate of...

A signal has the functional form f(t) = 5sin(40πt) and is sampled at a rate of 30 samples per second. What false alias frequency would you expect in the discrete data? What sampling rate would avoid aliasing this signal?

T/F/U. Stereotypes are a form of discrimination. If true, explain why they are and whether this...

T/F/U. Stereotypes are a form of discrimination. If true, explain why they are and whether this form of discrimination is resultantly prevalent . If false, explain why they aren ’ t and what other types of discrimina tion overtake stereotypes

Subjects