15 Assigned as Homework 15 The carbon-nitrogen bond that connects amino acids to
ID: 3484284 • Letter: 1
Question
15
Assigned as
Homework
15
The carbon-nitrogen bond that connects amino acids together in a protein is referred to as which of the following?
A
Peptide bond
B
Covalent bond
C
Ionic bond
D
Octet bond
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16
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Homework
16
Dr. Monroe wants to prevent Priscilla, the chair of biology, from digesting carbohydrates. Which organ should she remove from Priscilla that produces the enzymes needed for carbohydrate digestion?
A
Small intestine
B
Liver
C
Pancreas
D
Large intestine
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QuestionGroup: #17 Lipids
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Homework
17
All of the following are true about the liver EXCEPT:
A
It receives all the blood from the intestinal system by way of the portal circulation.
B
It produces iron directly with no need for having a food substrate
C
It stores fats and carbohydrates for energy.
D
It regulates blood glucose levels and synthesis of blood proteins
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QuestionGroup: #18 DNA
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18
This molecule controls the production of enzymes in animal cells.
A
It is DNA, a nucleotide that resides in the nucleus of cells
B
It is RNA, the ancestor to DNA
C
It is a protein
D
It is DNA, a carbohydrate
E
It is DNA, a nucleotide which resides in the cytoplasm of the cell
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QuestionGroup: #19 DNA2
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19
Which of the following represents the proper sequence for the "central dogma"?
A
RNA to Protein to DNA
B
RNA to DNA to Protein
C
DNA to RNA to Protein
D
Protein to RNA to DNA
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QuestionGroup: #20 Gene expression
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20
How many different kind of amino acids are necessary for mRNA to make proteins in humans?
A
Bogus question since mRNA does not use amino acids to make protein.
B
Bogus question since mRNA does not use amino acids to make protein rather it is the rough endoplasmic reticulum.
C
20
D
10
Explanation / Answer
15.A
Peptide bond also known as amide bond is form when a-carboxyl group of one amino acid is linked to the a-amino group of another acid resulting into the formation of dipeptide with elimination of water molecule.
16.A
Carbohydrate digestion is done by many enzymes which includes salivary amylase,pancreatic amylase,maltase,lactase and sucrase.
In small intestine,pancreatic juices is released which contains enzyme amylase which further breaks down the food previously(30%) broken down by salivary amylase.maltase.sucrase and lactase breaks down complex carbohydrates into simpler carbohydrates mainly glucose.
17.B
Liver performs all functions except B.
18.B
Enzymes are biological catalysts which are active proteins.since formation of proteins begins with RNA.Hence,rns controls enzyme production in animal cells.
19.C
Central dogma includes transcription then translation.DNA gets converted to RNA with the help of enzyme reverse trancriptase.these rna are of three types rrna,mrna,trna.all these rna plays major role in protein synthesis which is termed as translation.
20.A
Its not the mrna which uses amino acids.its trna which uses amino acids.
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