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11 Feb 2018

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1. Which of the following choices most accurately describes the proteins that form the linker histones of the chromatosome?

A) H2A, H2B, H3, H4

B) H2A, H1t, H5, H3

C) H5, H1a-e, H1t, H10

D) H3A, H1, H4A, H5

2. Which of the followings is not an example of randomly repeated DNA?

A) Minisatellites

B) Alphoid DNA in Centromere

C) Retrotransposons

D) Microsatellites

3) Which of the followings is not found in the human genome?

A) Long interspersed nuclear repeat

B) Short interspersed nuclear repeat

C) Insertional sequence

D) Long terminal repeat

4) Which of the following is not true?

A) Major portion of human genome is placed by repetitive sequences

B) The yeast genome is very compact

C) The higher eukaryotic organisms always have more complex genome

D) The genes make up only a small part of the human genome

5) What does the functional analysis of genome suggest the researchers about eukaryotic organisms?

A) All eukaryotic organisms have the same numbers of genes in each functional category.

B) All eukaryotic organisms have approximately the same number of genes.

C) Complex organisms have a larger portion of unknown genes

D) Complex organisms have greater numbers of genes in each functional category

E) Simpler organisms contain many fewer types of gene when compared to complex organisms

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Keith LeannonLv2
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Related questions

Needs help asap

_______________ are transposable elements that move within the genome by being copied and reinserted as DNA sequences, avoiding the need for reverse transcription"

A.

Retrotransposons
B

Retrovirus-like elements
C

DNA transposons
D

Satellite DNAs
E

Long interspersed elements (LINEs)

F.Short interspersed elements (SINEs)

The large differences observed in genomic size among eukaryotes correspond primarily to differences in

A

the amount of protein-coding genes
B

the amount of noncoding DNA
C

the biological complexity of the organisms at hand
D

the length of the telomeres

E the size of the centromere

The study of lncRNAs has revealed

A

that protein-coding genes are distributed homogeneously throughout the genome
B

that splicing regulates more genes than initially expected
C

that miRNAs are mostly limited to intronic sequences
D

that only a relatively small fraction of the human genome is ever transcribed
E

the existence of genomic regions coding exclusively for rRNA and tRNA
F

that extensive regions of our genome are in fact actively transcribed even though they do not contain protein-coding genes

1) In Eukaryotes, repetitive sequence inclues:
A) Centromere sequences
B) Telomere sequences
C) All of the above

2) Satelit DNA:
A) Was orignally discoverd in E. Coli
B) Represents plasmid DNA sequences
C) Contains repetitive DNA sequences
D) Has the same density as main band DNA
E) All of the above

3) Inversions _____ The number of crossover offspring.
A) Decrease
B) Increase
C) Do not change
(I Believe the answer is "C" ^. can you explain why?)

4) In human genome, repetitive DNA is estimated to be ___ of the total genome.
A) .1%
B) 1%
C) 10%
D) 50%
E) 90%

5) In E. Coli, the promoter sequence:
A) Contains a short AT rich sequence
B) Binds transcription factors
C) All of the above

6) In eukaryotic transcription:
A) Transcription factors bind to the promoter and then RNA polymerase binds.
B) Transcription factors bind to RNA polymerase which then binds to the promoter
C) Transcription factors are NOT required to initiate transcription

Explanation for each would help immensely. THANK YOU in advance for your time!!!

Please provide correct answer and explanation to the answer,Thank you!

  1. If an enterprising graduate student decided to repeat theHershey-Chase

    experiment but neglected to perform the blending portion, wherewill the

    isotopes be found?

    a. 35S will be found in the supernatant and 32P will be found inthe pellet

    b. 32P will be found in the supernatant and 35S will be found inthe pellet

    c. Both 32P and 35S will be found in the supernatant

    d. Both 32P and 35S will be found in the pellet

    e. None of the above are correct

  2. Chargaff�s rules include:

    a. The ratio of A�s + T�s to G�s + C�s is always consistent

    b. A=G and T=C

    c. Purines/Pyrimidines = 1

    d. More than one of the above are true

    e. None of the above are true

  3. Sea Urchin DNA contains 18% guanine (which is true); how muchthymine

    does it contain?

    a. 9%

    b. 18%

    c. 32%

    d. 36%

    e. 64%

  4. E. coli DNA contains a little over 25% guanine. If samples weretaken of E.

    coli DNA and Sea Urchin DNA and denatured in water baths, whichwould

    melt at a lower temperature?

    a. E. coli DNA

    b. Sea Urchin DNA

    c. They would melt at the same temperature

    d. There is not enough information to determine the answer

    e. DNA doesn�t �melt,� it isn�t ice cream for goodness sake!

  5. If testing the second generation results in tube B, which modelcan we

    conclude is correct?

    a. Dispersive

    b. Semi-conservative

    c. Conservative

    d. Semi-dispersive

    e. We can�t conclude yet, it could still be more than onepossibility

  6. Phosphorus is required to synthesize dNTPs used in DNAreplication. Imagine

    you grow E. coli in media containing non-radioactive phosphorusfor many

    generations, then switch the E. coli to media containingradioactive

    phosphorous (32P). You then sample the E. coli after one roundof replication

    for radioactivity. Where will you find radioactive phosphorus inthe DNA?

    a. Both strands will contain 32P

    b. One strand will contain 32P

    c. Neither strand will contain 32P

    d. Drats! I knew I should have done suggested problem 12.19!

  7. Which of the following statements about chromosomes are alwaystrue?

    I. Non-histone proteins make up about 5% of a eukaryotic

    chromosome by weight

    II. Histones have a negative charge

    III. Prokaryotes have a single linear chromosome

    a. Only Statement I is true

    b. Only Statement II is true

    c. Only Statement III is true

    d. More than one of the above statements are true

    e. None of the above statements are true

  8. What portion of the human genome is made up of highly repetitiveDNA?

    a. Less than 5%

    b. 6 � 20%

    c. 21 � 30%

    d. 31 � 40%

    e. Over 40%

  9. Which of the following statements are always true?

    I. Histones are very conserved between species

    II. Archaea have nuclei

    III. Prokaryotes are haploid and eukaryotes are diploid

    a. Only Statement I is true

    b. Only Statement II is true

    c. Only Statement III is true

    d. More than one of the above statements are true

    e. None of the above statements are true

  10. An individual�s phenotype is a function of:

    a. The alleles they carry

    b. The environment they live in

    c. The interaction between an individuals genes and theenvironment

    d. Two of the above are correct

    e. All of the above are correct

  11. A homologous pair of chromosomes showing a

    crossover are shown to the right for reference. Are all

    the sperm from one human male genetically identical?

    a. Yes

    b. No, variation occurs during mitosis

    c. No, variation occurs during meiosis I

    d. No, variation occurs during meiosis II

    e. No, variation occurs during both meiosis I and II

  12. Production of gametes in humans requires which kind ofdivision?

    a. Meiotic and is reductional

    b. Mitotic and is reductional

    c. Meiotic and is equational

    d. Mitotic and is equational

    e. None of the above

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