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Biol 2212; Exam 4 Practice Questions
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Biol 2212; Exam 4 Practice QuestionsA particular organism has 46 chromosomes in its karyotype. Which of the following statements is
correct regarding this organism?
- It must be human
- It must be an animal
- It produces gametes with 23 chromosomes
- It reproduces asexually - It produces gametes with 23 chromosomes
Crossing over of chromosomes normally takes place during which of the following processes?
- meiosis I
- meiosis II
- mitosis
- mitosis and meiosis II - meiosis I
In a typical animal, mitosis produces _________, while meiosis produces____________
- four diploid daughter cells, four haploid daughter cells
- two diploid daughter cells, two diploid daughter cells
- two diploid daughter cells, four haploid daughter cells
- four haploid daughter cells, two diploid daughter cells
- two diploid daughter cells, two haploid daughter cells - two diploid daughter cells, four haploid
daughter cells
Which of the following answers describes the phenomenon of crossing over in meiosis?
- The exchange of homologous portions of nonsister chromatids
- the movement of genetic material from one chromosome to a nonhomologous chromosome
- also referred to as the independent assortment of chromosomes
- making an RNA copy of a DNA strand
- a direct consequence of the separation of sister chromatids - The exchange of homologous portions
of nonsister chromatids
,Meiosis II is similar to mitosis in that
- homologous chromosomes synapse
- sister chromatids separate during anaphase
- DNA replicates before the division
- the daughter cells are diploid - sister chromatids separate during anaphase
How do cells at the completion of meiosis compare with cells that are in prophase of meiosis I?
- The cells have half the number of chromosomes and one-fourth the amount of DNA
- The cells have half the amount of cytoplasm and twice the amount of DNA
- The cells have half the number of chromosomes and half the amount of DNA
- The cells have the same number of chromosomes and half the amount of DNA - The cells have half
the number of chromosomes and one-fourth the amount of DNA
For the following question, match the key event of meiosis with the stages listed below.
I.Prophase 1
II.Metaphase 1
III.Anaphase 1
IV.Telophase 1
V.Prophase 2
VI.Metaphase 2
VII.Anaphase 2
VIII.Telophase 2
Cohesins at centromeres of sister chromatids breakdown:
- VII
-V
- IV
- III - VII
During which of the following processes do homologous pairs of chromosomes align adjacent to one
another at the metaphase plate of a cell?
, - metaphase II of meiosis
- metaphase of mitosis
- metaphase I of meiosis
- telophase II of meiosis - metaphase I of meiosis
Independent assortment of chromosomes is a result of which of the following processes?
- the diverse combination of alleles that may be found within any given chromosome
- the random way each pair of homologous chromosomes lines up at the metaphase plate during
meiosis I
- the random combinations of eggs and sperm during fertilization
- the random distribution of the sister chromatids to the two daughter cells during anaphase II - the
random way each pair of homologous chromosomes lines up at the metaphase plate during meiosis I
Once researchers identified DNA as the molecule responsible for transmitting heritable traits, they
asked how information was transferred from the DNA in the nucleus to the site of protein synthesis
in the cytoplasm. Which of the following statements correctly describes the mechanism of
information transfer that accomplishes this task in eukaryotes?
- DNA from a single gene is replicated and transferred to the cytoplasm, where it serves as a
template for protein synthesis
- Transfer RNA takes information from DNA directly to a ribosome, where protein synthesis takes
place
- RNA polymerase transfers information from the nucleus to tRNA synthase in the cytoplasm, where
protein synthesis takes place
- Messenger RNA is transcribed from a single gene and transfers information to the cytoplasm,
where protein synthesis takes place - Messenger RNA is transcribed from a single gene and transfers
information to the cytoplasm, where protein synthesis takes place
Which of the following molecules carries information from DNA and directs incorporation of amino
acids at the ribosome?
- mRNA
- rRNA
- tRNA
- enzymes - mRNA
Which of the following statements best describes the termination of transcription in prokaryotes?
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