[BIO] questions

[299678]

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1. in mammals, which of the following are produced after rearrangement of DNA sequences in specific cells?
a) Hemoglobin
b) Actin
c) antigens
d) antibodies
e) trypsins

2. Proteins associated with DNA in a eukaryotic chromosome serve all of the following functions except?
a) attachment of the plasma membrane
b) stablization of chromosome structure
c) regulation of gene transcription
d) regulation of DNA replication
e) catalysis of deoxynucleoside triphosphate polymerization

3. In eukaryotes, the large subunits of ribulose biphosphate carboxylase/oxygenase are coded for by the DNA and then synthesized in the
a) mitochondria
b) peroxisome
c) vacuoles
d) nuclei
e) chloroplast

4. Successful reproduction of lytic virus requires that all of the following processes occur except
a) incorporation of viral DNA into host cell DNA
b) translation of viral mRNA
c) binding of the virus to the host cell's surface
d) penetration of the viral genome into the host cell
e) replication of the viral genome

5. Cloned cDNA of beta hemoglobin mRNA can direct the synthesis of a complete and correct polypeptide in the bacterium E. COLI, wherease the corresponding cloned chromosomal gene cannot because
a) bacterial polymerase cannot transcribe interventing sequences
b) interventing sequences contain condons that are not recognized by tRNA
c) bacteria lack the enzymes necessary for splicing eukaryotic mRNA precursors
d) interventing sequences contain hairpin loops that block ribosomal function
e) bacteria cannot process the protein precursor to its correct size

6. When transported out of the phloem, sucrose is converted to starch by which of the following organellles in root cells?
a) vacuole
b) lysosomes
c) peroxisomes
d) mitochondria
e) plastids

huh~~~~ all tough questions for me

 

[nyr201]

1. in mammals, which of the following are produced after rearrangement of DNA sequences in specific cells?
a) Hemoglobin
b) Actin
c) antigens
d) antibodies
e) trypsins

2. Proteins associated with DNA in a eukaryotic chromosome serve all of the following functions except?
a) attachment of the plasma membrane
b) stablization of chromosome structure
c) regulation of gene transcription
d) regulation of DNA replication
e) catalysis of deoxynucleoside triphosphate polymerization

3. In eukaryotes, the large subunits of ribulose biphosphate carboxylase/oxygenase are coded for by the DNA and then synthesized in the
a) mitochondria
b) peroxisome
c) vacuoles
d) nuclei
e) chloroplast

4. Successful reproduction of lytic virus requires that all of the following processes occur except
a) incorporation of viral DNA into host cell DNA
b) translation of viral mRNA
c) binding of the virus to the host cell's surface
d) penetration of the viral genome into the host cell
e) replication of the viral genome

5. Cloned cDNA of beta hemoglobin mRNA can direct the synthesis of a complete and correct polypeptide in the bacterium E. COLI, wherease the corresponding cloned chromosomal gene cannot because
a) bacterial polymerase cannot transcribe interventing sequences
b) interventing sequences contain condons that are not recognized by tRNA
c) bacteria lack the enzymes necessary for splicing eukaryotic mRNA precursors
d) interventing sequences contain hairpin loops that block ribosomal function
e) bacteria cannot process the protein precursor to its correct size

6. When transported out of the phloem, sucrose is converted to starch by which of the following organellles in root cells?
a) vacuole
b) lysosomes
c) peroxisomes
d) mitochondria
e) plastids

huh~~~~ all tough questions for me

do u have an answer key? and where are these from?!?!

 

[299678]

Answer keys
1. d
2. a
3. e
4. a
5. c
6. e

really appreciate your input for each question for reasoning

 

[txlonghorn]

These arnt too hard, but worded in a way that complicates the problem. I didn't know a few of them, like the last one, but it seems like this material is covered in the ap book. 5 is kinda difficult - cDNA is used cause bacteria otherwise splice out the genes that are inserted in - they are identified as introns. Not sure I get what the answer says

 

[LuckMC11]

are u sure 3 is E lol

 

[nyr201]

1. in mammals, which of the following are produced after rearrangement of DNA sequences in specific cells?
a) Hemoglobin
b) Actin
c) antigens
d) antibodies
e) trypsins

2. Proteins associated with DNA in a eukaryotic chromosome serve all of the following functions except?
a) attachment of the plasma membrane
b) stablization of chromosome structure
c) regulation of gene transcription
d) regulation of DNA replication
e) catalysis of deoxynucleoside triphosphate polymerization

3. In eukaryotes, the large subunits of ribulose biphosphate carboxylase/oxygenase are coded for by the DNA and then synthesized in the
a) mitochondria
b) peroxisome
c) vacuoles
d) nuclei
e) chloroplast

4. Successful reproduction of lytic virus requires that all of the following processes occur except
a) incorporation of viral DNA into host cell DNA
b) translation of viral mRNA
c) binding of the virus to the host cell's surface
d) penetration of the viral genome into the host cell
e) replication of the viral genome

5. Cloned cDNA of beta hemoglobin mRNA can direct the synthesis of a complete and correct polypeptide in the bacterium E. COLI, wherease the corresponding cloned chromosomal gene cannot because
a) bacterial polymerase cannot transcribe interventing sequences
b) interventing sequences contain condons that are not recognized by tRNA
c) bacteria lack the enzymes necessary for splicing eukaryotic mRNA precursors
d) interventing sequences contain hairpin loops that block ribosomal function
e) bacteria cannot process the protein precursor to its correct size

6. When transported out of the phloem, sucrose is converted to starch by which of the following organellles in root cells?
a) vacuole
b) lysosomes
c) peroxisomes
d) mitochondria
e) plastids

huh~~~~ all tough questions for me

ok so i got 1 and 4 wrong lol but for the rest

idk for #2 proteins i think of DNA polymerases so i know they have nothing to do with plasma membrane.

for #3 i know ribulose biphosphate is used in the calvin cycle and so i know that calvin cycle occurs in the chloroplast so boom thats the only answer.

for #5 cDNA is DNA w no introns so the answer choice with "splicing" is the most attractive bc introns in mRNA get spliced out b4 they leave the nucleus. i know im not giving u amazing in depth explantions but these are tough questions (to me at least) and this is how i reason out the right answer with what i know

#6 I just read this over today so i just knew it lol

 

[UCB05]

huh~~~~ all tough questions for me

Where the deuce are you getting these questions??

1. Hemoglobin, actin, and trypsin are relatively set in stone in terms of their DNA-based protein sequences. Foreign antigens do not deal with DNA per se. The remaining answer is antibodies, which is not an obvious answer unless you've taken Immuno. The antigen-binding end of antibodies are based on a few sequences that can be differentially spliced and rearranged to produce a huge variety of antigen-binding sequences, which is a useful process for detecting the many possible antigens out in the world.

2. Not sure about this ‾\ 😵 /‾

3. Since rubisco is involved in glucose synthesis, my best guess would have been that it would be found in the chloroplast.

4. Incorporation of viral genetic material into the host genome is a characteristic of lysogenic viruses. Lytic viruses have more of a hit-it-and-quit-it approach to infection.

5. You should know bacterial DNA is not complex enough to require splicing. cDNA is based on mRNA that has already been spliced and processed. That's why a bacterium has no problem transcribing cDNA, but it fumbles when it comes to the original eukaryotic gene, which has a bunch of junk that the bacterium can't cut out.

6. Just a matter of plant physiology and knowing that amyloplasts, a class of plasmids, are involved in the conversion to and storage of starch.

 

[299678]

GRE biology question
I got 134 questions right out of 200, but still 87%
Hard ~~~

 

[Maygyver]

GRE biology question
I got 134 questions right out of 200, but still 87%
Hard ~~~

Why study GRE questions for the DAT?😕

 

[D25]

ok so i got 1 and 4 wrong lol but for the rest

idk for #2 proteins i think of DNA polymerases so i know they have nothing to do with plasma membrane.

for #3 i know ribulose biphosphate is used in the calvin cycle and so i know that calvin cycle occurs in the chloroplast so boom thats the only answer.

for #5 cDNA is DNA w no introns so the answer choice with "splicing" is the most attractive bc introns in mRNA get spliced out b4 they leave the nucleus. i know im not giving u amazing in depth explantions but these are tough questions (to me at least) and this is how i reason out the right answer with what i know

#6 I just read this over today so i just knew it lol

For #2, the first thing I think of are histones???? So I was thinking b

 

[Maygyver]

For #2, the first thing I think of are histones???? So I was thinking b

All of the following "except."

But still, why study GRE questions? Seems silly to not study DAT questions.