1. A neuron and a white cell have very different functions. For example, a neuron can receive and respond to electrical signals while a white cell defends the body because it ___________.to. the proteins in neurons are completely different from those in the white cell.b. neurons and white cells in an individual have the same genome.c. the neuron expresses some mRNAs that the white cell does not express.d. Both neurons and white cells are already differentiated cells that do not need to transcribe or translate genes. 2. Which of the following is the main reason for a typical eukaryotic gene to be able to respond to a greater variety of regulatory signals than a typical prokaryotic gene or operon?to. eukaryotes have three types of RNA polymeraseb. RNA polymerases in eukaryotes require general and unspecific transcription factorsc. the transcription of a gened. prokaryotic genes are packed in nucleosomes 3. The distinctive characteristics of different types of cells in a multicellular organism arise from the differential regulation of:to. gene replication in specificb. transcription of genes that are transcribed by the RNA pol IIc. routine maintenance gene transcriptiond. proteins that bind directly to the TATA Box of eukaryotic genes 4. Which or which (can select more than one alternative) of the control methods of genetic expression in eukaryotes NOT USED in prokaryotic cells?to. control how often a gene is expressedb. control how an mRNA is processedc. control which mRNA is exported from the nucleus to the cytosold. control which mRNA is translated to proteins in the ribosomeand. control how quickly proteins are destroyed once synthesized 5. Unlike DNA that usually forms a helical structure, different RNA molecules assume bends in a wide variety of 3D shapes. This is due to :to. RNA contains uracil and ribose as sugarb. the bases in the RNA cannot form hydrogen bonds with each otherc. nucleotides in RNA have a different chemical structure than they have in DNAd. Although RNA is single-stranded, complementary bases can pair with each other. 6. Viruses consist of a layer of protein that surrounds your genetic material. the genetic material in the HIV virus is:to. Double-stranded DNA (dsDNA)b. Single-stranded DNA (ssDNA)c. Double-stranded RNA (dsRNA)d. Single-stranded RNA (ssRNA) 7. If two bands corresponding to the 28S and 18S ribosomal unit are obtained in one of the lanes of a gel electrophoresis, there must be a sample of:to. DNAb. RNAc. protein
1. A neuron and a white cell have very different functions. For example, a neuron can receive and respond to electrical signals while a white cell defends the body because it ___________.
to. the proteins in neurons are completely different from those in the white cell.
b. neurons and white cells in an individual have the same genome.
c. the neuron expresses some mRNAs that the white cell does not express.
d. Both neurons and white cells are already differentiated cells that do not need to transcribe or translate genes.
2. Which of the following is the main reason for a typical eukaryotic gene to be able to respond to a greater variety of regulatory signals than a typical prokaryotic gene or operon?
to. eukaryotes have three types of RNA polymerase
b. RNA polymerases in eukaryotes require general and unspecific transcription factors
c. the transcription of a gene
d. prokaryotic genes are packed in nucleosomes
3. The distinctive characteristics of different types of cells in a multicellular organism arise from the differential regulation of:
to. gene replication in specific
b. transcription of genes that are transcribed by the RNA pol II
c. routine maintenance gene transcription
d. proteins that bind directly to the TATA Box of eukaryotic genes
4. Which or which (can select more than one alternative) of the control methods of genetic expression in eukaryotes NOT USED in prokaryotic cells?
to. control how often a gene is expressed
b. control how an mRNA is processed
c. control which mRNA is exported from the nucleus to the cytosol
d. control which mRNA is translated to proteins in the ribosome
and. control how quickly proteins are destroyed once synthesized
5. Unlike DNA that usually forms a helical structure, different RNA molecules assume bends in a wide variety of 3D shapes. This is due to :
to. RNA contains uracil and ribose as sugar
b. the bases in the RNA cannot form hydrogen bonds with each other
c.
d. Although RNA is single-stranded, complementary bases can pair with each other.
6. Viruses consist of a layer of protein that surrounds your genetic material. the genetic material in the HIV virus is:
to. Double-stranded DNA (dsDNA)
b. Single-stranded DNA (ssDNA)
c. Double-stranded RNA (dsRNA)
d. Single-stranded RNA (ssRNA)
7. If two bands corresponding to the 28S and 18S ribosomal unit are obtained in one of the lanes of a gel electrophoresis, there must be a sample of:
to. DNA
b. RNA
c. protein
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