Question 1

When an mRNA moves into the cell's cytoplasm,it first becomes associated with a:

Accepted Answer

A) protein. 
B) tRNA. 
C) ribosome. 
D) transcription factor. 
A) protein. 
B) tRNA. 
C) ribosome. 
D) transcription factor. C

Question 2

If a codon has the sequence CAG,tRNA with which anticodon will bind to it?

Accepted Answer

A) CTG 
B) UGA 
C) GTC 
D) CAG 
E) GUC 
A) CTG 
B) UGA 
C) GTC 
D) CAG 
E) GUC E

Question 3

The human genome codes for 20,000 to 25,000 proteins,but any given cell might produce only 5,000 different proteins.How is this possible?

Accepted Answer

A) Every cell contains a different fraction of the genome. 
B) All possible proteins are made in all cells, but those that are not needed are degraded. 
C) Some cells use introns to produce proteins, and some cells use exons. 
D) Genes are regulated so that not all genes are transcribed in all cells. 
E) Not every cell has the machinery for transcription and translation. 
A) Every cell contains a different fraction of the genome. 
B) All possible proteins are made in all cells, but those that are not needed are degraded. 
C) Some cells use introns to produce proteins, and some cells use exons. 
D) Genes are regulated so that not all genes are transcribed in all cells. 
E) Not every cell has the machinery for transcription and translation. D

Question 4

The larger an organism is,the larger its genome must be.

Accepted Answer

A) True 
 B)False

Question 5

How large is the human genome?

Accepted Answer

A) 3)2 billion base pairs 
B) 10 billion base pairs 
C) 1 million base pairs 
D) 1 trillion base pairs 
E) 3 million base pairs 
A) 3)2 billion base pairs 
B) 10 billion base pairs 
C) 1 million base pairs 
D) 1 trillion base pairs 
E) 3 million base pairs

Question 6

If a base sequence in DNA reads GCA,what will be the corresponding codon in the mRNA?

Accepted Answer

A) CGT 
B) GCT 
C) GCU 
D) CGU 
E) ACG 
A) CGT 
B) GCT 
C) GCU 
D) CGU 
E) ACG

Question 7

Alternative splicing is:

Accepted Answer

A) removing introns and retaining exons. 
B) removing exons and retaining introns. 
C) when a single primary transcript is edited in different ways to yield multiple mRNAs. 
D) converting an exon into an intron. 
A) removing introns and retaining exons. 
B) removing exons and retaining introns. 
C) when a single primary transcript is edited in different ways to yield multiple mRNAs. 
D) converting an exon into an intron.

Question 8

Transcription:

Accepted Answer

A) occurs on the ribosome. 
B) is the final process in the assembly of a protein. 
C) is the synthesis of RNA from a DNA template. 
D) is catalyzed by DNA polymerase. 
E) occurs in the cytoplasm. 
A) occurs on the ribosome. 
B) is the final process in the assembly of a protein. 
C) is the synthesis of RNA from a DNA template. 
D) is catalyzed by DNA polymerase. 
E) occurs in the cytoplasm.

Question 9

In the sequence of events during translation,what is the next step after an mRNA binds to the ribosome's small subunit?

Accepted Answer

A) A tRNA enters the A site of the ribosome. 
B) An amino acid from a tRNA in the P site attaches to an amino acid on the tRNA in the A site. 
C) A tRNA binds to the start codon, and the large ribosomal subunit joins the ribosome. 
D) A tRNA is released from the E site. 
E) The ribosome shifts down the mRNA by one codon. 
A) A tRNA enters the A site of the ribosome. 
B) An amino acid from a tRNA in the P site attaches to an amino acid on the tRNA in the A site. 
C) A tRNA binds to the start codon, and the large ribosomal subunit joins the ribosome. 
D) A tRNA is released from the E site. 
E) The ribosome shifts down the mRNA by one codon.

Question 10

The codon AAC in mRNA will match with the tRNA anticodon sequence ________.

Accepted Answer

The answer of The codon AAC in mRNA will match...

Question 11

Which of the following statements is true about micro-RNAs?

Accepted Answer

A) Alternative splicing converts them into mRNAs. 
B) They bring amino acids to the ribosome. 
C) They regulate the amount of protein in a cell by interfering with mRNAs. 
D) They are too small to be of any use to the cell. 
A) Alternative splicing converts them into mRNAs. 
B) They bring amino acids to the ribosome. 
C) They regulate the amount of protein in a cell by interfering with mRNAs. 
D) They are too small to be of any use to the cell.

Question 12

What accounts for the fact that cells in different tissues and organisms have different functions and respond differently to their environments?

Accepted Answer

A) The cells use the same genes to make different proteins. 
B) The cells have different genes. 
C) The cells are expressing (using)different genes. 
D) The cells use different genetic codes. 
E) The cells DNA is different. 
A) The cells use the same genes to make different proteins. 
B) The cells have different genes. 
C) The cells are expressing (using)different genes. 
D) The cells use different genetic codes. 
E) The cells DNA is different.

Question 13

In translation,when an incoming tRNA with the next amino acid comes into the ribosome,it enters the ________ site,while the tRNA with the growing polypeptide chain is located in the ________ site.

Accepted Answer

The answer of In translation,when an incoming tRNA with the...

Question 14

How many different types of amino acids are found in proteins?

Accepted Answer

A) 100 
B) 200 
C) 1,000 
D) 20 
E) 4 
A) 100 
B) 200 
C) 1,000 
D) 20 
E) 4

Question 15

Wherever there is an adenine on a DNA strand,during transcription it will be base-paired with a ________ on an RNA strand.

Accepted Answer

A) thymine 
B) adenine 
C) guanine 
D) cytosine 
E) uracil 
A) thymine 
B) adenine 
C) guanine 
D) cytosine 
E) uracil

Question 16

Approximately what percent of the human genome codes for protein?

Accepted Answer

A) less than 2 percent 
B) 97 percent 
C) 75 percent 
D) 12 percent 
E) 21 percent 
A) less than 2 percent 
B) 97 percent 
C) 75 percent 
D) 12 percent 
E) 21 percent

Question 17

How many bases does it take to code for a single amino acid?

Accepted Answer

A) one 
B) two 
C) three 
D) four 
E) six 
A) one 
B) two 
C) three 
D) four 
E) six

Question 18

Match between columns
                        Premises: These regulatory sequences reduce production of specific proteins.
This forms part of the structure of a ribosome.
One end of this links to an amino acid.
A primary transcript must be edited before becoming this.
This contains large segments that used to be considered "junk."

Accepted Answer

The Answer of DNA and micro-RNA and rRNA and mRNA is...

Question 19

Which of the following brings amino acids to the ribosomes?

Accepted Answer

A) exons 
B) messenger RNA 
C) transfer RNA 
D) introns 
E) ribosomal RNA 
A) exons 
B) messenger RNA 
C) transfer RNA 
D) introns 
E) ribosomal RNA

Question 20

Refer to the figure below, and then answer the question that follows.
  
-Primary transcripts are spliced by enzymes that recognize base sequences at the beginnings and ends of introns.A mutation changes the base sequence in a segment of DNA.If a mutation changed the base sequence at the beginning of the first intron so that it was no longer recognized by a splicing enzyme,how would that affect translation?

Accepted Answer

The intron would remain in the mature mR

Exam 14: How Proteins Are Made: Genetic Transcription, translation, and Regulation

When an mRNA moves into the cell's cytoplasm,it first becomes associated with a:

If a codon has the sequence CAG,tRNA with which anticodon will bind to it?

The human genome codes for 20,000 to 25,000 proteins,but any given cell might produce only 5,000 different proteins.How is this possible?

The larger an organism is,the larger its genome must be.

How large is the human genome?

If a base sequence in DNA reads GCA,what will be the corresponding codon in the mRNA?

Alternative splicing is:

Transcription:

In the sequence of events during translation,what is the next step after an mRNA binds to the ribosome's small subunit?

The codon AAC in mRNA will match with the tRNA anticodon sequence ________.

Which of the following statements is true about micro-RNAs?

What accounts for the fact that cells in different tissues and organisms have different functions and respond differently to their environments?

In translation,when an incoming tRNA with the next amino acid comes into the ribosome,it enters the ________ site,while the tRNA with the growing polypeptide chain is located in the ________ site.

How many different types of amino acids are found in proteins?

Wherever there is an adenine on a DNA strand,during transcription it will be base-paired with a ________ on an RNA strand.

Approximately what percent of the human genome codes for protein?

How many bases does it take to code for a single amino acid?

Which of the following brings amino acids to the ribosomes?

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

Filters

In translation,when an incoming tRNA with the next amino acid comes into the ribosome,it enters the site,while the tRNA with the growing polypeptide chain is located in the site.