Test
Principles of Biology I - Unit 3 Quiz
Preguntas del test (18)
1An organism’s ________________ is determined by its _________________.
- AGenotype; phenotype
- BPhenotype; genotype
- CAllele; phenotype
- DF1 generation; allele
2What are Barr bodies?
- AX chromosomes inactivated to prevent over-expression of the alleles found on the X chromosome in females
- BHighly condensed Y chromosomes in males
- CX chromosomes inactivated to allow for expression of the males-specific phenotype
- DInactive autosomal chromosomes specific to females
3If one strand of a DNA molecule has the sequence ATTGCAT, then the complementary strand will have the sequence
- AATTGCAT
- BTACGTTA
- CTAACGTA
- DGCCTAGC
4What is the central dogma of molecular biology?
- ADNA is the genetic material.
- BInformation passes from DNA to protein.
- CInformation passes from DNA to RNA to protein
- DOne gene encodes only one polypeptide
5Nondisjunction results in
- AAn improper number of chromosomes
- Baneuploidy
- CNone of the above
- DBoth a and b above
6The principle that states that two alleles for a gene separate during gamete formation and are rejoined at random, one from each parent during fertilization is called
- AMendel’s second law of heredity
- BThe principle of segregation
- CLaw of independent assortment
- DMendel’s third law of heredity
7When more than one gene affects a trait, this is known as ____________ and an example of this can be found with _______________.
- APleiotropy; eye color
- BIncomplete dominance; hairline
- CPolygenic inheritance; eye color
- DCodominance; sex-linked disorders
8In certain flowers, the heterozygous condition is displayed as an intermediate phenotype between the two homozygous conditions. For example, crossing red snapdragons with white snapdragons produces pink snapdragons. This is an example of:
- AIncomplete dominance
- BCodominance
- CSegregation
- DEpistasis
9Nondisjunction of the sex chromosomes is much more likely to occur in women than in men because
- Athis is not true; nondisjunction occurs equally in men and women
- BWomen have two X chromosomes to the one X chromosome in men
- CWomen’s eggs have developed prior to birth while men form new sperm cells daily and so the eggs are much older.
- DIt is carried on the X chromosome
10If an organism’s DNA is known to be composed of 23% adenine, what percentage of their DNA would be composed of guanine?
- A27%
- B23%
- CUnable to determine from the data given
- D46%
11The process in which DNA is used as a template to form another DNA molecule is called
- ATranscription
- BReverse transcription
- CReplication
- DTranslation
12In addition to adding bases to the growing DNA strand during replication, DNA polymerase is also responsible for
- AProofreading the new DNA molecule as it is being synthesized
- BSynthesizing RNA
- CMaking proteins
- DDNA polymerase has only the one function
13DNA is always synthesized in the __________ direction and because of this, the lagging strand is synthesized ______________, forming Okazaki fragments.
- A3’-5’; discontinuously
- B3’-5’; continuously
- C5’-3”; discontinuously
- D5’-3’; continuously
14Some errors that may occur during DNA replication may be repaired. The type of repair that does not require the presence of light is known as:
- APhotorepair
- BMutagen repair
- CRadiation
- DExcision repair
15What is added to eukaryotic transcripts following transcription
- A5’ cap and a 3’ poly A tail
- B3’ cap and a 5’ poly A tail
- C5’ hat and a 3’ poly B tail
- D3’ bonnet and a 5’ poly A tail
16Where does translation occur in eukaryotes?
- AIn the nucleus
- BIn the golgi apparatus
- COn the ribosomes
- DIn a vacuole
17A mutation that alters a single base but does not alter the amino acid that is coded for is called a _________ mutation.
- AMissense
- BSilent
- CNonsense
- Dnoisy
18Which of the following is a good example of epistasis?
- Ared and white snapdragons are bred and the offspring are pink
- BHimalayan rabbits produce temperature-sensitive products
- Cwhen mice have one copy of the spinning gene they spin but with two copies, they die.
- DE gene determines fur color of Labrador retrievers and the B gene determines the darkness of the pigment
Información
- Descripción
- unit 3 multiple choice questions from practice exam
- Autor
- dumb himbo
- Idioma
- English
- Visitas
- 38
- Etiquetas
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