One compound that is a product of the Calvin cycle is ___. A) NADPH |
B) G3P |
The first step of the Calvin Cycle is the incorporation of ___into___. A) O2…G3P |
C) CO2…RuBP |
the last stage of one complete turn of the Calvin cycle involves A) G3P production |
D) regeneration of RuBP |
If an herbicide blocked the Calvin cycle before the generation of glyceradlehyde 3-phosphate (G3P), which of the following statements would be true? A) The plant would need more carbon dioxide. |
D) No sugar would be made by the plant. |
The Calvin cycle makes direct use of ___ to make___. A) light energy and CO2…sugar |
D) CO2, ATP, and NADPH…sugar |
Which of the following is found in both cellular respiration and in the light reactions of photosynthesis? A) citric acid cycle |
E) electron transport chain |
___is the source of the oxygen gas released by a photosystem. A) NADPH |
B) H2O |
Which of the following is the source of electrons for the light reactions? A) C6H12O6 |
E) H2O |
Where are photosystems located? A) inner chloroplast membrane |
C) thylakoid membrane |
What compound is found at the reaction center of a photosystem? A) chlorophyll c |
E) chlorophyll a |
The light reactions of a photosynthesis take place ___. A) in the stroma |
C) in the thylakoid membrane |
When a chlorophyll A absorbs a photon, one of its electrons is raised to the ___ state. A) energetic |
E) excited |
Which of the following is a way that a molecule releases energy gained by absorption of a photon? A) heat |
E) all of the above |
If a plant appears blue to us what wavelength of light is being reflected? A) blue |
A) blue |
The energy of wavelengths that appear ___ is least useful to photosynthesis. A) violet |
C) green |
What is responsible for the yellow-orange coloration of leaves in the fall? A) RuBP |
D) carotenoids |
What is one reason why plants have accessory pigment molecules, like chlorophyll b and carotenoids? A) to reflect more energy |
B) to absorb energy in parts of the electromagnetic spectrum that chlorophyll a cannot |
What name is given to a discrete packet of light? A) phaser |
D) photon |
The products of the light reactions of photosynthesis are ___. A) ATP and NADH |
C) ATP and NADPH |
In photosynthesis, redox reactions ultimately transfer electrons from ___to____. A) O2…CO2 |
E) H2O…CO2 |
The light reactions of photosynthesis convert ___ energy to ___ energy. A) solar…chemical |
A) solar…chemical |
The Calvin cycle requires ___ and ___ from the light-dependent reactions in order to operate. A) glucose…carbon dioxide |
C) ATP…NADPH |
What name is given to the membranous sacs found within a chloroplast? A) stroma |
D) thylakoids |
What are grana? A) thick fluids inside chloroplasts |
C) stacks of membranous sacs |
Which of the following equations best summarizes photosynthesis? A) 6 CO2 + 6 H20 + 6 O2 –> C6H12O6 |
B) 6 CO2 + 6 H2O –> C6H12O6 + 6 O2 |
In which organelle does photosynthesis take place? A) mitochondrion |
C) chloroplast |
Which of the following is an autotroph? A) human |
C) pine tree |
The best definition of a true-breeding plant is one that___ A) cannot be cross-fertilized |
B) self-fertilized to produce offspring identical to the parent |
Mendel discovered that a mating between a true-breeding purple-flowered pea plant seeds and a true-breeding white-flowered pea plant seeds produced____. A) only true-breeding varieties |
C) hybrids |
Alleles are described as ___. A) homologous chromosomes |
C) alternate versions of a gene |
A true-breeding plant that produces yellow seeds is crossed with a true-breeding plant that produces greed seeds. The seeds of all of the offspring are yellow. Why? A) The yellow allele is recessive to the green allele. |
C) The yellow allele is dominat to the green allele. |
A true-breeding plant that produces yellow seeds is crossed with a true-breeding plant that produces green seeds. The F1 plants have yellow seeds. What is the expected phenotypic ratio of seed color of the offspring of an F1 x F1 cross? A) 1:2:1 |
C) 3:1 |
According to Mendel’s law of segregation, ___. A) two alleles segregate into each gamete |
D) gametes have one copy of each allele |
Attached earlobes are recessive to free earlobes. What genotypic ratio is expected when an individual with attached earlobes mates with an individual heterozygous for free earlobes? A) 2:1 |
C) 1:1 |
Mendel’s Law of Independent assortment states that if you have two pairs of alleles, one pair will segregate into one sperm or egg cell while the other pair will separate into the other sperm or egg cell. A) True |
A) True |
Red-green color blindness is inherited as a sex-linked recessive trait. The gene is found on the X chromosome. How can a man with normal color vision father a daughter who is red-green color-blind? A) The woman with whom he mates is red-green color-blind. |
D) he cant (unless there is a mutation) |
Chromosomes that are not sex chromosomes are called____. A) centrosomes |
D) autosomes |
____genes violate Mendel’s principle of independent assortment. A) Codominat |
C) Linked |
In humans, the inheritance of ___ is best explained as being polygenic. A) cystic fibrosis |
B) height |
An individual with (naturally) curly hair and an individual with (naturally) straight hair mate; all of their offspring have (naturally) wavy hair. If an individual with wavy hair mates with an individual with straight hair, what is the probability that thier child will have curly hair? A) 0% |
A) 0% |
Which of the following techniques is used to collect fetal cells during pregnancy for genetic testing? A) testcross |
C) amniocentesis |
The____is most commonly found in nature A) recessive trait |
B) wild-type trait |
A couple has two female children. What is the probability that their next child will be male? A) 25% |
B) 50% |
In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the genotype of an individual who is heterozygous for dimples? A) dimples |
C) Dd |
An individual who is homozygous___. A) expresses the dominant trait |
D) carries two copies of the same allele for a gene |
Which of these crosses will only produce heterozygous offspring? A) AA x aa |
A) AA x aa |
DNA & RNA are polymers composed of ____ monomers. |
A) nucleotide |
the backbone of DNA consists of ____. |
C) a repeating sugar-phosphate-sugar-phosphate pattern |
the DNA double helix is ____. |
A) made up of two polynucleotide strands |
RNA contains the nitrogenous base ___ instead of ___, which is only found in DNA. |
C) uracil…thymine |
If adenine makes up 20% of the bases in a DNA double helix, what percent of the bases are guanine? |
E) 30% |
In a DNA double helix, adenine pairs with ___ and guanine pairs with ____. |
D) thymine…cytosine |
IF one strand of DNA double helix has the sequence GTCCAT, what is the sequence of the other strand? |
C) CAGGTA |
Who discovered the structure of DNA? |
B) Watson & Crick |
Evidence for the spiral nature of DNA came from ____. |
A) X-ray crystallography studies |
What type of chemical bond joins the bases of complementary DNA strands? |
E) hydrogen |
After replication, ____. |
B) each new DNA double helix consists of one old strand and one new strand |
During replication, ____ are the enzymes responsible for joining the nicks of a new DNA strand together. |
B) DNA ligases |
How many amino acids are common to all living systems? |
B) 20 |
How many nucleotides make up a codon? |
C) three |
The mutation would be most harmful to the cells if it resulted in ____. |
A) a single nucleotide insertion near the start of the coding sequence |
HIV (human immunodeficiency virus) must use its own ____ to reproduce. |
B) reverse transcriptase |
How can bacteriophage DNA be spread from cell to cell without causing cell death? |
D) via a lysogenic cycle |
Viruses that infect bacteria are ____. |
E) bacteriophages |
A mutation within a gene that will insert a premature stop codon in mRNA would _____. |
B) result in a shortened polypeptide chain |
Translation converts the information stored in ____ to ____. |
B) RNA … a polypeptide |
The RNA that is translated into polypeptide is ____ RNA. |
E) messenger |
What protects mRNA from attack by cellular enzymes? |
E) a cap and tail |
The region of DNA where RNA synthesis begins is the ___. |
B) promoter |
The correct sequence of events occurring during transcription is ____. |
B) initiation, elongation, termination |
Which of the following enzymes is responsible for RNA synthesis? |
E) RNA polymerase |
The process by which genotype becomes expressed as phenotype is ___. |
C) gene expression |
In bacteria, what name is given to a cluster of genes with related functions, along with their control sequences? |
A) operon |
Bacterial RNA polymerase binds to the ____. |
D) promoter |
Repressors act by blocking the binding of ____ to the operator. |
E) RNA polymerase |
What is the first level of control of eukaryotic gene transcription? |
D) DNA packing & unpacking |
Which of these plays a role in the regulation of transcription in both prokaryotic and eukaryotic cells? |
B) attachment of RNA polymerase to the promoter |
Introns are ___. |
A) noncoding DNA sequences |
Cells communicate with one another via ___. |
C) signal transduction pathways |
Which of these techniques could tell you how gene expression differs between individuals with and without cystic fibrosis? |
B) DNA microarray |
How is it that the cells in different body tissues are able to perform different functions? |
A) The cells exhibit different patterns of gene expression |
To make a clone, a genetically identical organism, from a mammalian cell, the cell must ____. |
D) be dedifferentiated |
Possible uses of reproductive cloning include___. A) the production of genetically identical animals for experimentation |
E) all the above |
What is a difference between embryonic and adult stem cells? |
C) Embryonic stem cells are undifferentiated; adult stem cells are partially differentiated. |
What name is given to a gene that causes cancer? |
E) oncogene |
Which of these is most likely to cause the development of a six – legged frog? |
A) mutation of homeotic genes |
Which of the following is the best definition for recombinant DNA? |
C) DNA that carries genes from two different sources |
Which of these is a genetically modified organism? |
A) an organism carrying a gene that was acquired by artificial means |
The world’s first genetically engineered pharmaceutical product was ____. |
A) humulin |
A vaccine works by ___. |
B) stimulating the immune system to develop lasting defenses |
Transgenic animals are currently used___. |
A) to produce potentially useful proteins |
Which of these can act as a vector to introduce new genes into a cell? |
E) plasmids |
Of these steps, which occurs first in the production of a recombinant plasmid? |
D) isolation of a plasmid from a bacterium |
When plasmids are used to produce a desired protein, the ___. |
D) desired gene is inserted into the plasmid and the plasmid is taken up by the bacterium |
The human genome contains approximately ____ genes. |
D) 21,000 |
Approximately what percentage of the human genome consists of noncoding DNA? |
A) 98% |
Biology 1408 FInal
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