Question 1

Telomeres are

Accepted Answer

A)  microtubule binding sites in the center of chromosomes. 
B)  sites at the ends of chromosomes where DNA replication begins. 
C)  chromosome end structures required for complete replication of linear chromosomes. 
D)  sites at the ends of chromosomes where microtubules bind. 
A)  microtubule binding sites in the center of chromosomes. 
B)  sites at the ends of chromosomes where DNA replication begins. 
C)  chromosome end structures required for complete replication of linear chromosomes. 
D)  sites at the ends of chromosomes where microtubules bind.

Question 2

Which of the following is the most abundant form of chromatin in the interphase nucleus of a cell?

Accepted Answer

A)  Euchromatin 
B)  Nucleoli 
C)  Chromosomes 
D)  Heterochromatin 
A)  Euchromatin 
B)  Nucleoli 
C)  Chromosomes 
D)  Heterochromatin

Question 3

A centromere is a region of the chromosome that

Accepted Answer

A)  is located at the ends of the chromosomes and plays a critical role in chromosome replication and maintenance. 
B)  is relatively decondensed and distributed throughout the nucleus. 
C)  is very highly condensed and resembles the chromatin of cells undergoing mitosis. 
D)  plays a critical role in ensuring the correct distribution of duplicated chromosomes to daughter cells during mitosis. 
A)  is located at the ends of the chromosomes and plays a critical role in chromosome replication and maintenance. 
B)  is relatively decondensed and distributed throughout the nucleus. 
C)  is very highly condensed and resembles the chromatin of cells undergoing mitosis. 
D)  plays a critical role in ensuring the correct distribution of duplicated chromosomes to daughter cells during mitosis.

Question 4

Partial digestion of eukaryotic chromatin with micrococcal nuclease (an endonuclease) results in DNA fragments that are 200 (or multiples of 200) base pairs long because nucleosomes are spaced 200 base pairs apart.

Accepted Answer

A) True 
 B)False

Question 5

The percentage of the average human gene that encodes proteins is approximately

Accepted Answer

A)  3%. 
B)  25%. 
C)  70%. 
D)  90%. 
A)  3%. 
B)  25%. 
C)  70%. 
D)  90%.

Question 6

The endogenous noncoding RNAs that mediate RNA interference are _______.

Accepted Answer

The answer of The endogenous noncoding RNAs that mediate RNA...

Question 7

The enzyme that replicates the sequences at the end of eukaryotic chromosomes is called _______.

Accepted Answer

The answer of The enzyme that replicates the sequences at...

Question 8

Which statement about LINEs is false?

Accepted Answer

A)  Transposition of LINEs often carries adjacent sequences of DNA along with them into the new sites of integration. 
B)  Transposition of LINEs may carry regulatory elements of one gene into a region of another gene. 
C)  Some LINEs contain a gene encoding reverse transcriptase. 
D)  Mutations induced by LINEs are exclusively harmful. 
A)  Transposition of LINEs often carries adjacent sequences of DNA along with them into the new sites of integration. 
B)  Transposition of LINEs may carry regulatory elements of one gene into a region of another gene. 
C)  Some LINEs contain a gene encoding reverse transcriptase. 
D)  Mutations induced by LINEs are exclusively harmful.

Question 9

Heterochromatin gets its name from the fact that it contains a mixture of active and inactive genes.

Accepted Answer

A) True 
 B)False

Question 10

If a human gene is found to contain five introns, the mature mRNA encoded by that gene would have how many exons?

Accepted Answer

A)  Four exons 
B)  Five exons 
C)  Six exons 
D)  There could be multiple mRNAs that contain between one and six introns. 
A)  Four exons 
B)  Five exons 
C)  Six exons 
D)  There could be multiple mRNAs that contain between one and six introns.

Question 11

Which of the following transposable elements accounts for ~21% of the human genome?

Accepted Answer

A)  Long interspersed elements (LINEs) 
B)  Short interspersed elements (SINEs) 
C)  Retrovirus-like elements 
D)  DNA transposons 
A)  Long interspersed elements (LINEs) 
B)  Short interspersed elements (SINEs) 
C)  Retrovirus-like elements 
D)  DNA transposons

Question 12

Prior to undergoing mitosis, dividing cells replicate DNA during _______.

Accepted Answer

The answer of Prior to undergoing mitosis, dividing cells replicate...

Question 13

During the processing of miRNAs, which of the following cleaves the 5ʹ and 3ʹ tails away from the hairpin structure in the primary miRNA transcript?

Accepted Answer

A)  Drosha 
B)  Dicer 
C)  RNAse 
D)  Integrase 
A)  Drosha 
B)  Dicer 
C)  RNAse 
D)  Integrase

Question 14

The function of telomeres is to

Accepted Answer

A)  degrade the ends of chromosomes. 
B)  provide repetitive sequences in circular DNA molecules. 
C)  join two sister chromatids. 
D)  provide a site for replication of chromosome ends. 
A)  degrade the ends of chromosomes. 
B)  provide repetitive sequences in circular DNA molecules. 
C)  join two sister chromatids. 
D)  provide a site for replication of chromosome ends.

Question 15

Euchromatin consists of

Accepted Answer

A)  decondensed, transcriptionally active chromatin. 
B)  100-nm chromatin fibers. 
C)  DNA associated with nucleosomes. 
D)  highly condensed, transcriptionally inactive chromatin. 
A)  decondensed, transcriptionally active chromatin. 
B)  100-nm chromatin fibers. 
C)  DNA associated with nucleosomes. 
D)  highly condensed, transcriptionally inactive chromatin.

Question 16

The DNA of eukaryotic cells is wrapped around histones to form structures called

Accepted Answer

A)  nucleoli. 
B)  nuclear matrices. 
C)  nucleosomes. 
D)  centromeres. 
A)  nucleoli. 
B)  nuclear matrices. 
C)  nucleosomes. 
D)  centromeres.

Question 17

What is the term used to describe functional protein encoding regions found completely within an intron?

Accepted Answer

A)  Pseudogene 
B)  Polymorphism 
C)  Nested gene 
D)  Alternative splicing 
A)  Pseudogene 
B)  Polymorphism 
C)  Nested gene 
D)  Alternative splicing

Question 18

Telomeres are required for the complete replication of linear chromosomes.

Accepted Answer

A) True 
 B)False

Question 19

Eukaryotic DNA wrapped around a core of eight histones forms a _______.

Accepted Answer

The answer of Eukaryotic DNA wrapped around a core of...

Question 20

During metaphase in actively dividing cells, DNA is in

Accepted Answer

A)  heterochromatin. 
B)  nucleoli. 
C)  chromosomes. 
D)  euchromatin. 
A)  heterochromatin. 
B)  nucleoli. 
C)  chromosomes. 
D)  euchromatin.

Telomeres are

Which of the following is the most abundant form of chromatin in the interphase nucleus of a cell?

A centromere is a region of the chromosome that

Partial digestion of eukaryotic chromatin with micrococcal nuclease (an endonuclease) results in DNA fragments that are 200 (or multiples of 200) base pairs long because nucleosomes are spaced 200 base pairs apart.

The percentage of the average human gene that encodes proteins is approximately

The endogenous noncoding RNAs that mediate RNA interference are _______.

The enzyme that replicates the sequences at the end of eukaryotic chromosomes is called _______.

Which statement about LINEs is false?

Heterochromatin gets its name from the fact that it contains a mixture of active and inactive genes.

If a human gene is found to contain five introns, the mature mRNA encoded by that gene would have how many exons?

Which of the following transposable elements accounts for ~21% of the human genome?

Prior to undergoing mitosis, dividing cells replicate DNA during _______.

During the processing of miRNAs, which of the following cleaves the 5ʹ and 3ʹ tails away from the hairpin structure in the primary miRNA transcript?

The function of telomeres is to

Euchromatin consists of

The DNA of eukaryotic cells is wrapped around histones to form structures called

What is the term used to describe functional protein encoding regions found completely within an intron?

Telomeres are required for the complete replication of linear chromosomes.

Eukaryotic DNA wrapped around a core of eight histones forms a _______.

During metaphase in actively dividing cells, DNA is in

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

Mitochondria, Chloroplasts, and Peroxisomes

The Cytoskeleton and Cell Movement

The Plasma Membrane

Cell Walls, the Extracellular Matrix, and Cell Interactions

Cell Signaling

The Cell Cycle

Cell Death and Cell Renewal

Cancer

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Exam 6: Genes and Genomes

Telomeres are

Which of the following is the most abundant form of chromatin in the interphase nucleus of a cell?

A centromere is a region of the chromosome that

Partial digestion of eukaryotic chromatin with micrococcal nuclease (an endonuclease) results in DNA fragments that are 200 (or multiples of 200) base pairs long because nucleosomes are spaced 200 base pairs apart.

The percentage of the average human gene that encodes proteins is approximately

The endogenous noncoding RNAs that mediate RNA interference are _______.

The enzyme that replicates the sequences at the end of eukaryotic chromosomes is called _______.

Which statement about LINEs is false?

Heterochromatin gets its name from the fact that it contains a mixture of active and inactive genes.

If a human gene is found to contain five introns, the mature mRNA encoded by that gene would have how many exons?

Which of the following transposable elements accounts for ~21% of the human genome?

Prior to undergoing mitosis, dividing cells replicate DNA during _______.

During the processing of miRNAs, which of the following cleaves the 5ʹ and 3ʹ tails away from the hairpin structure in the primary miRNA transcript?

The function of telomeres is to

Euchromatin consists of

The DNA of eukaryotic cells is wrapped around histones to form structures called

What is the term used to describe functional protein encoding regions found completely within an intron?

Telomeres are required for the complete replication of linear chromosomes.

Eukaryotic DNA wrapped around a core of eight histones forms a _______.

During metaphase in actively dividing cells, DNA is in

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

Mitochondria, Chloroplasts, and Peroxisomes

The Cytoskeleton and Cell Movement

The Plasma Membrane

Cell Walls, the Extracellular Matrix, and Cell Interactions

Cell Signaling

The Cell Cycle

Cell Death and Cell Renewal

Cancer

Filters