Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by whitelisting our website.

Biochemistry

Internal conversion is where

Biochemistry, Uv Luminance Spectroscopy /
Question: Internal conversion is where
[A].

the spin of an excited electron reverses, changing the state of the molecule (from singlet state to triplet state or vice versa)

[B].

A molecule converts its excess energy to light, and emits a photon

[C].

A molecule converts excess electronic energy to vibrational energy

[D].

none of the above

Answer: Option C

Explanation:

No answer description available for this question.

Internal conversion is where Read More »

Biochemistry, Uv Luminance Spectroscopy

Fluorescence occurs when

Biochemistry, Uv Luminance Spectroscopy /
Question: Fluorescence occurs when
[A].

a molecule returns to the electronic ground state from an excited triplet state by losing it’s excess energy as a photon

[B].

a molecule returns to the electronic ground state from an excited singlet state by losing it’s excess energy as a photon

[C].

a molecule lowers its vibrational energy by losing it’s excess energy as a photon

[D].

none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Fluorescence occurs when Read More »

Biochemistry, Uv Luminance Spectroscopy

The binding of lac repressor to DNA could be considered to be analogous to

Biochemistry, Transcription And Regulation /
Question: The binding of lac repressor to DNA could be considered to be analogous to
[A].

competitive inhibition of an enzyme

[B].

mixed-type inhibition of an enzyme

[C].

uncompetitive inhibition of an enzyme

[D].

allosteric effects in enzyme regulation

Answer: Option A

Explanation:

No answer description available for this question.

The binding of lac repressor to DNA could be considered to be analogous to Read More »

Biochemistry, Transcription And Regulation

In eukaryotes, there are three different RNA polymerases. The RNA polymerase responsible for transcription of mRNA is

Biochemistry, Transcription And Regulation /
Question: In eukaryotes, there are three different RNA polymerases. The RNA polymerase responsible for transcription of mRNA is
[A].

RNA polymerase I

[B].

RNA polymerase II

[C].

RNA polymerase III

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

In eukaryotes, there are three different RNA polymerases. The RNA polymerase responsible for transcription of mRNA is Read More »

Biochemistry, Transcription And Regulation

In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as

Biochemistry, Transcription And Regulation /
Question: In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as
[A].

CATT

[B].

Shine Dalgarno region

[C].

TATA box

[D].

SV40 region

Answer: Option C

Explanation:

No answer description available for this question.

In both eukaryotes and prokaryotes, a promoter region that is rich in AT bases is called as Read More »

Biochemistry, Transcription And Regulation

Multiple copies of 5S genes, located at a chromosomal site distinct from the other rRNA genes

Biochemistry, Transcription And Regulation /
Question: Multiple copies of 5S genes, located at a chromosomal site distinct from the other rRNA genes
[A].

are transcribed by rRNA polymerase III and the 5S rRNA

[B].

are transcribed by rRNA polymerase II

[C].

are transcribed by rRNA polymerase I and the 5S rRNA

[D].

are transcribed by DNA polymerase I

Answer: Option A

Explanation:

No answer description available for this question.

Multiple copies of 5S genes, located at a chromosomal site distinct from the other rRNA genes Read More »

Biochemistry, Transcription And Regulation

Most transcripts of protein coding genes are cleaved

Biochemistry, Transcription And Regulation /
Question: Most transcripts of protein coding genes are cleaved
[A].

at the 3′ end just after a poly adenylation signal

[B].

at the 3′ end just before a poly adenylation signal

[C].

at the 5′ end immediately after a poly adenylation signal

[D].

at the 5′ end immediately before a poly adenylation signal

Answer: Option A

Explanation:

No answer description available for this question.

Most transcripts of protein coding genes are cleaved Read More »

Biochemistry, Transcription And Regulation