4477769
Descripción
Test por Jaidha Rosenblat, actualizado hace más de 1 año
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Creado por Jaidha Rosenblat
hace casi 9 años
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Pregunta 1
Pregunta
Which of these is the most accurate description of the term "gene?"
Respuesta
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A sequence of DNA nucleotides that are the code for making a particular protein.
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A strand of DNA that acts as a 3D protein printer.
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A notable feature or quality of an organism
Pregunta 2
Pregunta
Which of the following is the most accurate description of the term "chromosome?"
Respuesta
-
A long DNA double-helix, tightly wound around histone proteins.
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A "protein printing" machine.
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Long molecules of mRNA
Pregunta 3
Pregunta
Three dimensional printed objects with specific shapes and functions
Respuesta
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mRNA
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DNA
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Proteins
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Nucleotides
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Ribosomes
Pregunta 4
Pregunta
The cell's "3D printers."
Respuesta
-
mRNA
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Ribosomes
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DNA
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Nucleotides
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Proteins
Pregunta 5
Pregunta
The cell's "flash-drive"--portable copies of files or apps.
Respuesta
-
mRNA
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DNA
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Ribosomes
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Proteins
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Nucleotides
Pregunta 6
Pregunta
Software stored in the cell's "hard-drive."
Respuesta
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mRNA
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DNA
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Ribosomes
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Proteins
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Nucleotides
Pregunta 7
Pregunta
Symbols of the cell's software code.
Respuesta
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mRNA
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DNA
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Ribosomes
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Proteins
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Nucleotides
Pregunta 8
Pregunta
Genes are made of a sequence of the nucleotides A, C, T and G.
Respuesta
- True
- False
Pregunta 9
Pregunta
Choose all responses that correctly complete this sentence:
All 20 naturally occurring amino acids are identical in_____________________________________
Respuesta
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The atoms in the "amino" group.
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The central carbon atom with its attached hydrogen atom.
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The atoms in the "carboxylic acid" group
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The atoms in the "R-group" side-chain.
Pregunta 10
Pregunta
Two important categories of macro-molecules in cells are nucleic acids (DNA and the different RNAs), and protein. Which of the following are characteristics of proteins?
Respuesta
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Its function is determined by its shape.
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Genes are made of this type of molecule.
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Its function is determined by the sequence of its chemical "symbols."
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A chain of nucleotides is a....
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A chain of amino acids is a...
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It is synthesized ("printed") by ribosomes
Pregunta 11
Pregunta
Match each term with its correct description. Making an mRNA copy of a gene.
Respuesta
-
DNA Replication
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transcription
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translation
Pregunta 12
Pregunta
Match each term with its correct description: Copying all a cell's DNA, just before the cell divides into two cells.
Respuesta
-
DNA Replicaiton
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transcription
-
translation
Pregunta 13
Pregunta
Match each term with its correct description: Reading mRNA code and printing a protein.
Respuesta
-
DNA Replication
-
transcription
-
translation
Pregunta 14
Pregunta
Choose the most correct answer to this question:
What are nucleotides?
Respuesta
-
The molecular symbols of the genetic code.
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Chromosomes
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Amino acids
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Proteins
Pregunta 15
Pregunta
On the left are "letters" on one side of a DNA double helix. Add the correct complementary DNA letters, according to the "base-pairing" rule of DNA replication: CGTTA
[blank_start]_____[blank_end]
Respuesta
-
GCAAT
Pregunta 16
Pregunta
Match each biological structure to the job it does in the cell: "Unzips" a DNA molecule, in the process of DNA replication
Respuesta
-
helicase
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tRNA
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mRNA
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ribosomes
Pregunta 17
Pregunta
Match each biological structure to the job it does in the cell: Prints proteins.
Respuesta
-
helicase
-
tRNA
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mRNA
-
ribosomes
Pregunta 18
Pregunta
Match each biological structure to the job it does in the cell: Carries a "print this protein" message to ribosomes.
Respuesta
-
helicase
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tRNA
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mRNA
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Ribosomes
Pregunta 19
Pregunta
Match each biological structure to the job it does in the cell: Delivers amino acids to ribosomes.
Respuesta
-
helicase
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tRNA
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mRNA
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ribosomes
Pregunta 20
Pregunta
Select the TWO most precisely correct answers
What functions does DNA perform for the cell?
Respuesta
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It prints proteins, from amino acids provided to it by tRNA.
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The sequence of its nucleotides provide the code for how to print the cell's proteins.
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The full sequences of all its nucleotides can be replicated, so that when a cell can divides, each new cell gets a full copy of the "hard-drive".
Pregunta 21
Pregunta
The following processes happen in one of two places: Inside the nucleus
Respuesta
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Transcription of mRNA from DNA gene
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Synthesis (printing) of proteins
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Translation of mRNA message by ribosomes.
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DNA replication
Pregunta 22
Pregunta
The shape of the protein is determined by[blank_start]...[blank_end]
The sequence of amino acids is determined by[blank_start]...[blank_end]
The sequence of mRNA nucleotides is determined by[blank_start]...[blank_end]
A protein's function is determined by[blank_start]...[blank_end]
Respuesta
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amino acids
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the shape of the protein
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mRNA
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DNA
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amino acids
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mRNA
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shape of Proteins
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DNA
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amino acids
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shape of proteins
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mRNA
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DNA
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mDNA
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DNA
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amino acids
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shape of proteins
Pregunta 23
Pregunta
The images we always see of chromosomes shaped like an "X" are actually "identical twin chromosomes" (chromatids), after DNA replication.
Respuesta
- True
- False
Pregunta 24
Pregunta
Which of the following are performed by proteins?
Respuesta
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Transport amino acids to ribosomes.
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Is translated by ribosomes.
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Carry out active transport across the cell membrane.
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Carry the genetic inheritance of a cell or organism.
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Form complex cell structures (such as the cytoskeleton).
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Act as enzymes
Pregunta 25
Pregunta
Which of the following are performed by RNA?
Respuesta
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Transport amino acids to ribosomes.
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Is translated by ribosomes.
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Carry out active transport across the cell membrane.
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Carry the genetic inheritance of a cell or organism.
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Form complex cell structures (such as the cytoskeleton)
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Act as enzymes
Pregunta 26
Pregunta
Which of the following are performed by DNA?
Respuesta
-
Transport amino acids to ribosomes.
-
Is translated by ribosomes.
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Carry out active transport across the cell membrane.
-
Carry the genetic inheritance of a cell or organism.
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Form complex cell structures (such as the cytoskeleton).
-
Act as enzymes
Pregunta 27
Pregunta
ONE of the following steps does NOT occur during DNA replication (right before a cell divides). Which step is NOT part of DNA replication?
Respuesta
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The DNA double helix is "unzipped" by helicase protein (eventually, unzipping the entire length of every chromosome).
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Make mRNA copies of the DNA.
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Add complementary DNA nucleotides to each side of the unzipped helix.
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Proofread two resulting helices.
Pregunta 28
Pregunta
Which "letters" (nucleotides) are found in the DNA "alphabet?"
Respuesta
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U
-
A
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G
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C
-
T
Pregunta 29
Pregunta
Which "letters"(nucleotides) are in the RNA"alphabet?"
Respuesta
-
U
-
C
-
G
-
A
-
T
Pregunta 30
Pregunta
Match each energy-gathering process (below) with which organisms do this process.
Respiration: [blank_start]___[blank_end]
Photosynthesis: [blank_start]__[blank_end]
Respuesta
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Both autotrophs and heterotrophs
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Autotrophs only
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Heterotrophs only
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Both autotrophs and heterotrophs
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Autotrophs only
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Heterotrophs only
Pregunta 31
Pregunta
Which of the following statements are TRUE about glycolysis?
Respuesta
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Glycolysis occurs in a cell's cytoplasm
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Glycolysis produces a small number of "recharged" ATP molecules, for each glucose broken down. Correct
-
Glycolysis requires oxygen
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Glycolysis happens inside a cell's mitochondria.
Pregunta 32
Pregunta
Select each molecule that has high (chemical) energy
Respuesta
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Water and CO2
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ADP and phosphate
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ATP
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Oxygen
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Glucose
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