I need help on this question. I understand this topic, but I don't know how to present it.

Also, mine is a bit long winded. I do not want to write too long and I end up not having enough time for other questions.

Is my answer sufficient ?

\"Describe the role of tRNA in DNA replication.
Protein synthesis, also called translation , begins when the two ribosomal subunits link onto the mRNA. Transfer molecules are comprised of nucleotides, which are small building blocks for both RNA and DNA. The role of tRNA is to read the message of nucleic acids (nucleotides) and translate it into proteins (amino acids). Transfer RNA (tRNA) is the key to deciphering the code words in mRNA. tRNA reads the mRNA in short, three-letter words called codons. RNA (tRNA) molecules transfer amino acids and carries them to the ribosomes. Ribosomes have a binding site for mRNA and binding sites for two transfer RNA (tRNA) molecules. Ribosomes facilitate complementary base pairing between tRNA anticodons and mRNA codons; one protein is an enzyme that joins amino acids together by means of a peptide bond. Each codon on the mRNA specifies a particular amino acid, which is recognized by the anticodon of the complementary tRNA. tRNAs have the same general cloverleaf shape with base-paired arms, but with one variable side arm and a different anti-codon sequence. tRNA is a single-stranded ribonucleic acid that doubles back on itself to create regions where complementary bases are hydrogen-bonded to one another. At one end tRNA binds to amino acid; at other end it has an anticodon that binds to mRNA codon; anticodon is group of nucleotides on a tRNA molecule complementary to codon on mRNA. The tRNA aligns with the codon and brings the appropriate amino acid to the translation machinery. Ribosome moves down mRNA molecule, new tRNAs arrive; amino acids join; polypeptide forms. Amino acids become sequenced in polypeptides according to information provided by gene; tRNAs accomplish translation, converting nucleic acid code into amino acid sequence. The amino acid it carries can be used to add to a growing polypeptide chain. The ribosome forms a peptide bond between the two amino acids that were brought in by the tRNAsFinally, during termination, the ribosome unbinds from the mRNA, and the amino acid chain goes on to be processed and folded to make the final, functional protein. The tRNA is reused and collects another specific amino acid. \"

Do we have to mention Okazaki fragments ?

I'm not sure whether this topic is in the current syllabus. I've found it in a school exam paper, with no answer solution.

The answer is a long story line, I'm not sure how much info input I have to mention.
I have tried to summarise, but it seems that I can't do it as the key words have to be mentioned too.

Can someone please advise me ?

Thank you very much ! :salute:

Can someone help with this question ?


Explain how it is possible that parents with different blood groups are able to produce only children with blood groups different from themselves.

Thank you !

Hi,


I need to know questions likely to come out for this year exam.

can anyone give predictions on questions for this coming O level exams, for both SS and elective history ?

Please help to contribute questions from various schools , this year SA1 and Prelim papers.

I’m thinking of taking statistics basing on various schools after all combined humanities are set and marked locally.

thanks

Can someone please help with the followings ? thanks


After she sweeps the floor, she did the ironing

or

After she sweeps the floor, she does the ironing

Sandy and Sarah are having their lunch when they received a prank call.
or

Sandy and Sarah were having their lunch when they received a prank call.

this question is taken from Nanchiau P5 SA2 2012.

Can somebody help to answer ? thanks

Wendy had 2 bags of rice, A and B, weighing 88 kg altogether.
The bags contained different amount of rice. Wendy poured 1/3 of the rice from bag A to bag B. Then she poured 1/5 of the rice from bag B bag A, As a result, both bags had the same
How much rice was there in bag A at first?

another question,

what are the key words required ? DS seems to have verbal constipation in asnwering these questions. Please help. thanks.
http://i49.tinypic.com/2rxz5fo.jpg\">

http://i45.tinypic.com/2zq77v4.jpg\"> [IMG]

@ verykiasumummy, many thanks for your answer.

But still am still puzzle, why DS answer is marked incorrect by his teacher
and why his teacher circle the word 'iron'.

http://i46.tinypic.com/r8xg1w.jpg\">
sorry to ask again, please help me with the graph question
posted on Wed Nov 07, 2012 1:56 pm

Thank you !

http://i47.tinypic.com/33otkt0.jpg\">


The temperature cannot suddenly plunge to 10 degrees within 2 minutes, or lose heat to the surrounding within a short period of time, unless ice cubes are dropped into the water.

how to go about answering this question ?

Please help me with the P6 prelim question.


http://i49.tinypic.com/mh6aa.jpg\">

(a)\tExplain why the paper clips fell off the iron core, but not off the steel core.


(b)\t In a junkyard, an electromagnet is used to attract an old car before dropping it off at another place.
Is the iron core or steel core more suitable for use as the core of an electromagnet? Give a reason for your answer.

Thanks a lot for the solution !