BioChem Quizzes

Complete reviewer for BioChem quizzes.

Which of the following is the correct classification of a 5 carboned carbohydrate that is aldehyde-based?

Aldopentose

Which of the following is the type of polysaccharide found on the exoskeleton of crabs?

Chitin

Which of the following functional group is found on monosaccharide?

Aldehyde and Ketone

Which of the following is the 6-membered ring found on cyclic carbohydrates?

Pyran

What is the bond that links a disaccharide?

Glycosidic Bond

Which of the following defines anomeric carbon?

The carbon without a hydroxyl group

Common table sugar

Sucrose

7 Carbon Atoms

Heptose

6 Carbon Atoms

Hexose

5 Carbon Atoms

Pentose

3 Carbon Atoms

Triose

Sugar used in brewing beer

Maltose

Linear, less soluble in water, slower to digest, straight, forms helical structure

Amylose

Branched, more soluble, faster to digest, more accessible to enzymes

Amylopectin

4-carboned carbohydrate that is ketone based

Ketotetrose

Which of the following statement is correct about carbohydrates?

Monosaccharides are polyhydroxylated aldehydes and ketones

Unsaturated fatty acid

Molecule B

Wax molecule

Molecule A

Which of the following statement is correct for unsaturated fatty acid?

Unsaturated fatty acids have double bond in their carbon chain, and it is liquid at room temperature

Which of the following is the base molecule for triglycerides?

Glycerol

Which of the following is NOT a lipid?

Cellulose

Which of the following is an example of non-saponifiable lipid?

Progesterone

Which of the following type of lipid can be made soap?

Triglycerides

Which of the following functional group allows the phospholipid to be amphipathic?

Phosphate

Omega-3 Fatty Acid

Molecule A

Which of the following statement is correct about saturated fatty acids?

Saturated fatty acids do not have double bond in their carbon chain, and it is solid at room temperature

What is the charge of the sugar-phosphate backbone

Negative

Which of the following is the purpose of DNA and RNA?

DNA is the storage of genetic information, while RNA is the messenger that delivers the info to build a specific amino acid chain or a protein

Which of the following is the complementary to the sense sequence of 5'-TACATCGCTTCG-3'

3'-ATGTAGCGAAGC-5'

How many ring/s does a purine have?

2

What does specific base-pairing mean?

Purines and Pyrimidines are paired respectively, Cytosine is paired with Guanine, and Adenine is paired with Thymine

How many ring/s does a pyrimidine have?

1

Which of the following is the location of the DNA in a prokaryotic cell?

Cytoplasm

Which of the following is the RNA sequence to this sense sequence of 5'-TACATCGCTTCG-3'

5'-AUGUAGCGAAGC-3'

Which of the following is the correct list of components of a nucleotide?

Phosphate, sugar, and nitrogenous base

How many bonds does a cytosine and guanine have?

3

How many bonds does a adenine and thymine have?

2

Nucleoside

Nitrogenous base, sugar, no phosphate group

Final condensed package form of DNA found in the nucleus

Chromosome

Which of the following refers to the strand of DNA that has discontinuous formation of DNA strand during its synthesis?

Lagging strand

Which of the following refers to the starting point of DNA Replication in a chromosome?

Origin of Replication

Which of the following universal features of DNA replication refers to having a leading and lagging strand?

Semidiscontinuous

Which of the following is the correct direction of DNA replication?

5' to 3'

Which of the following enzyme seals the nicks of the between Okazaki fragments?

DNA ligase

Which of the following universal features of DNA that allows it to preserve the parental DNA strand every rounds of replication?

Semiconservative

Which of the following replisome is responsible for the preventing the reannealing of the two unwounded DNA strand and formation of hairpins?

SSBPs

When do DNA replication takes place?

During interphase of the cell cycle

Which of the following enzyme is responsible for preventing the supercoiling of the DNA?

Topoisomerase

DNA replication may proceed even with an inhibited topoisomerase

False

Which of the following enzyme unwinds the double stranded DNA?

Helicase

Which of the following components in replication process guides the polymerase where to start the synthesis of DNA strand?

Primers

Which of the following is possible to happen if a gene loses the promoter sequence?

There will be no protein product

Which of the following RNA has the codons that will be used in the translation process?

mRNA

How many type of protein can be produced in a single gene of a eukaryotic organism?

Multiple

Which of the following DNA strand is used as a template for transcription process?

Antisense

Which of the following region could stop the transcription process?

Terminator

Which of the following is the promoter for prokaryotic organism?

Pribnow box

Which of the following is the main enzyme used for transcription?

RNA polymerase

Which of the following is added to the 5'-end of the mRNA during post-transcriptional modifications?

Methylguanosine

Which of the following region allows the attachment of the RNAP to the gene?

Promoter

Which of the following RNA is designed to be part of the ribosome?

rRNA

Which of the following is added to the 3'-end of the mRNA during post-transcriptional modifications?

Poly-A

Which of the following is NOT a function of RNA polymerase?

Synthesis of DNA strand

Which of the following sequence is a sequence of DNA that does not contain an equivalent protein product?

Noncoding regions

Which of the following subunit of RNAP can recognize the promoter sequence?

Sigma (σ)

How many type of protein can be produced in a single gene of a prokaryotic organism?

Only one protein

Which of the following ribosomal site is responsible for the holding the start codon and the initial amino acid which is eventually destined to be bonded to an incoming amino acid?

P Site

Which of the following RNA has the codon, that is the primary substrate for translation process and necessary for the correct sequence of amino acids?

mRNA

Prokaryotes conduct (a) replication, (b) transcription, and (c) translation within its cytoplasm due to the absence of nucleus. How can the mRNA product of prokaryotes survive the environment of cytoplasm without post-transcriptional modification?

During transcription, the ribosomes are already conducting the translation process as new mRNA sequence are being synthesized by the RNAP

Which of the following ribosomal site is responsible for determining the correct tRNA by pairing its anti-codon to the codon of the mRNA?

A site

Which of the following is probable to happen if the rRNA was not synthesized during the transcription process?

The absence of rRNA will result to an incomplete ribosomes and this will prevent the translation process

Which of the following is the start codon?

5'-AUG-3'

Which of the following allows the degeneracy on the codons by relaxing the 3rd ribonucleotide (placement 3 in codon, and placement 1 in anti-codon)?

Wobble Hypothesis

Which of the following has the anti-codon that complements the codon which results to the correct placement of amino acids during peptide chain synthesis?

tRNA

Which of the following RNA is destined to become part of the Ribosomes?

rRNA

Professor Hojo discovered an alien life form from a meteorite and found out that it is a carbon-based organism and is using DNA as its genetic material. He conducted a recombinant DNA technology by placing a gene sequence into a plasmid and introducing the plasmid to a bacteria. The protein product of the gene inserted by Professor Hojo was expressed in the bacteria. How is it possible that an alien gene sequence was expressed in a bacteria?

The expression of gene follows the genetic code which is universal hence allowing the expression of the foreign DNA sequence to the host bacteria