Q&A Hero

Science

Q: The C-Br bond in CH3CH2Li is a ________ (nonpolar, polar) covalent bond with a ________ () charge on the carbon atom and a ________ () charge on the lithium atom.
Q: Which of the following statements about properties of organic compounds is not correct? A) Most organic compounds are not soluble in water. B) Most organic compounds do not conduct electricity. C) Organic compounds have higher melting and boiling points than ionic compounds. D) Organic compounds have weak intermolecular forces.
Q: The C-Br bond in CH3Br is a ________ (nonpolar, polar) covalent bond with a ________ () charge on the carbon atom and a ________ () charge on the bromine atom.
Q: The most important characteristic of carbon atoms for forming organic molecules is A) ability to bond together to form long chains. B) ability to form multiple covalent bonds. C) use of hybrid orbitals. D) A and B
Q: Orbitals used by carbon for bonding in C2H6, C2H4, and C2H2 are ________, ________, and ________, respectively.
Q: The H-C-H bond angles in C2H6, C2H4, and C2H2 are ________, ________, and ________, respectively.
Q: In organic molecules the molecular geometry exhibited by carbon is ________ when carbon is bonded to four atoms by four single bonds, ________ when carbon is bonded to three atoms by one double bond and two single bonds, and ________ when carbon is bonded to two atoms by one triple bond and one single bond.
Q: In the protein, Arg- Pro- Leu- Gln, which amino acid contains the C-terminal group?A) prolineB) leucineC) glutamineD) arginine
Q: In the protein, His- Tyr- Val- Pro, which amino acid contains the N-terminal group? A) valine B) tyrosine C) proline D) histidine
Q: Which one of the following amino acids contains a hydrophobic side chain? A) valine B) histidine C) glutamine D) glutamic acid
Q: Which one of the following amino acids contains a polar side chain? A) alanine B) glycine C) threonine D) valine
Q: Which one of the following amino acids does not contain a basic side chain? A) arginine B) histidine C) lysine D) threonine
Q: Which one of the following molecules is the most polar? A) butane B) butanoic acid C) cyclohexane D) ethanol
Q: Which compound is a saturated hydrocarbon? A) 1-butyne B) cycloheptene C) 3- methylheptane D) 2-heptyne
Q: When octane, C8H18, reacts with oxygen to produce carbon dioxide and water, 5070 kJ of heat are released per mole of methane. How many kJ of heat are released per gram of oxygen used? A) 6.34 kJ/g B) 12.7 kJ/g C) 1980 kJ/g D) 3960 kJ/g
Q: How many isomers are there for C5H12? A) 3 B) 4 C) 5 D) 6
Q: Identify the following amine base found in nucleic acids.A) Adenine (A)B) Cytosine (C)C) Thymine (T)D) Uracil (U)
Q: Identify the following amine base found in nucleic acids. A) Adenine (A) B) Cytosine (C) C) Thymine (T) D) Uracil (U)
Q: Identify the following amine base found in nucleic acids. A) Adenine (A) B) Cytosine (C) C) Thymine (T) D) Uracil (U)
Q: Identify the following amine base found in nucleic acids. A) Adenine (A) B) Cytosine (C) C) Thymine (T) D) Uracil (U)
Q: Identify the following dipeptide. A) Ser-Ala B) Ser-Leu C) Ser-Phe D) Ser-Val
Q: Identify the following dipeptide. A) Ser-Ala B) Ser-Leu C) Ser-Phe D) Ser-Val
Q: Is the following model of glucose in the form or the form?A) formB) form
Q: Is the following model of glucose in the form or the form?A) formB) form
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Based on the structure of its side chains, the amino acid shown below can be classified as A) acidic. B) basic. C) neutral, non-polar. D) neutral, polar.
Q: Identify the amino acid shown below. A) Arganine (Arg) B) Histidine (His) C) Lysine (Lys) D) Valine (Val)
Q: Identify the amino acid shown below. A) Arganine (Arg) B) Histidine (His) C) Lysine (Lys) D) Valine (Val)
Q: Identify the amino acid shown below. A) Arganine (Arg) B) Histidine (His) C) Lysine (Lys) D) Valine (Val)
Q: Identify the amino acid shown below. A) Arganine (Arg) B) Histidine (His) C) Lysine (Lys) D) Valine (Val)
Q: Identify the amino acid shown below. A) Asparagine (Asn) B) Aspartic acid (Asp) C) Glutamic acid (Glu) D) Glutamine (Gln)
Q: Identify the amino acid shown below. A) Asparagine (Asn) B) Aspartic acid (Asp) C) Glutamic acid (Glu) D) Glutamine (Gln)
Q: Identify the amino acid shown below. A) Asparagine (Asn) B) Aspartic acid (Asp) C) Glutamic acid (Glu) D) Glutamine (Gln)
Q: Identify the amino acid shown below. A) Asparagine (Asn) B) Aspartic acid (Asp) C) Glutamic acid (Glu) D) Glutamine (Gln)
Q: Identify the amino acid shown below. A) Cysteine (Cys) B) Serine (Ser) C) Threonine (Thr) D) Tyrosine (Tyr)
Q: Identify the amino acid shown below. A) Cysteine (Cys) B) Serine (Ser) C) Threonine (Thr) D) Tyrosine (Tyr)
Q: Identify the amino acid shown below. A) Cysteine (Cys) B) Serine (Ser) C) Threonine (Thr) D) Tyrosine (Tyr)
Q: Identify the amino acid shown below. A) Cysteine (Cys) B) Serine (Ser) C) Threonine (Thr) D) Tyrosine (Tyr)
Q: Identify the amino acid shown below. A) Methionine (Met) B) Phenylalanine (Phe) C) Proline (Pro) D) Tryptophan (Trp)
Q: Identify the amino acid shown below. A) Methionine (Met) B) Phenylalanine (Phe) C) Proline (Pro) D) Tryptophan (Trp)
Q: Identify the amino acid shown below. A) Methionine (Met) B) Phenylalanine (Phe) C) Proline (Pro) D) Tryptophan (Trp)
Q: Identify the amino acid shown below. A) Methionine (Met) B) Phenylalanine (Phe) C) Proline (Pro) D) Tryptophan (Trp)
Q: Identify the amino acid shown below. A) Alanine (Ala) B) Glycine (Gly) C) Isoleucine (Ile) D) Leucine (Leu)
Q: Identify the amino acid shown below. A) Alanine (Ala) B) Glycine (Gly) C) Isoleucine (Ile) D) Leucine (Leu)
Q: Identify the amino acid shown below. A) Alanine (Ala) B) Glycine (Gly) C) Isoleucine (Ile) D) Leucine (Leu)
Q: Identify the amino acid shown below. A) Alanine (Ala) B) Glycine (Gly) C) Isoleucine (Ile) D) Leucine (Leu)
Q: Transfer-RNA is involved in A) replication. B) transcription. C) translation. D) none of these
Q: The process of forming mRNA from DNA is called A) metamorphosis. B) replication. C) transcription. D) translation.
Q: The base sequences in mRNA that code for particular amino acids are Trp: UGG, Phe: UUU, and Glu: GAA. What is the peptide that is produced from the DNA sequence: CTTACCAAA? A) Glu-Phe-Trp B) Glu-Trp-Phe C) Phe-Trp-Glu D) Trp-Glu-Phe
Q: What is the complementary mRNA sequence to GCTATACCGT? A) ATCGCGTTAC B) CGAUAUGGCA C) TUGCGCUUTG D) UTCGCGTTUC
Q: What is the complementary DNA sequence to ATATGGTC? A) CGCGTTGA B) GCGCAACT C) TATACCAG D) TUTUCCAG
Q: Which of the following bases pairs with adenine in DNA? A) cytosine B) guanine C) thymine D) uracil
Q: The nucleotide sequence, T-A-G, stands for A) threonine-alanine-glutamine B) thymine-adenine-guanine C) tyrosine-asparagine-glutamic acid D) None of these
Q: What is the backbone of the nucleic acid constructed of? A) alternating sugar phosphate groups B) amine bases C) glucose polymers D) polyamides
Q: What is the sugar component in RNA called? A) fructose B) galactose C) glucose D) ribose
Q: The attractive force between the cylic amine bases in DNA is A) disulfide bridges. B) hydrogen bonding. C) hydrophobic stacking. D) ionic interactions of salt bridges.
Q: Which of the following is not part of a nucleotide? A) cyclic amine base B) fatty acid C) phosphoric acid D) a sugar
Q: The one cyclic amine base that occurs in DNA but not in RNA is ________. A) cystine B) guanine C) thymine D) uracil
Q: Which one of the following amine bases does not appear in DNA? A) adenine B) cytosine C) guanine D) uracil
Q: What functional group is commonly found in fats?
Q: All of the fatty acids below contain eighteen carbons and range from saturated to three double bonds. Which has the highest melting point? A) stearic acid (saturated) B) oleic acid (one double bond) C) linoleic acid (two double bonds) D) linolenic acid (three double bonds)
Q: Which statement below regarding fatty acids is not correct? Fatty acids A) are always liquids. B) are long chain carboxylic acids. C) are usually unbranched chains. D) usually have an even number of carbon atoms.
Q: Lipids are characterized by what property? A) chemical reactivity B) chemical structure C) refractive index D) solubility
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