1-60 Flashcards
(30 cards)
- The cytogenetic characteristics of a nucleus in G1 period of an
interphase:
a) 2n: 4c DNA; b) 2n: 2c DNA; c) n: 2c DNA.
2n: 2c DNA
- The cytogenetic characteristic of a
nucleus in S - period of an interphase:
a) 2n: 4c DNA; b) 2n: 2c DNA; c) n: 2c DNA.
a) 2n: 4c DNA
- The cytogenetic characteristic of a nucleus in G2 - period of an
interphase:
a) 2n: 4c DNA; b) 2n: 2c DNA; c) n: 2c DNA.
a) 2n: 4c DNA;
The cytogenetic characteristics of a cell nucleus in a telophase of a
mitosis:
a)2n: 4c DNA; b) 2n: 2c DNA; c) n: 2c DNA
b) 2n: 2c DNA
The cytogenetic characteristics of a nucleus of the cell which have
entered meiosis I:
a) 2n: 2c DNA; b) 2n: 4c DNA; c) n: 2c DNA.
b) 2n: 4c DNA
The cytogenetic characteristics of a nucleus of the cell which have
entered meiosis II:
a) 2n: 2c DNA; b) 2n: 4c DNA; c) n: 2c DNA.
c) n: 2c DNA.
The cytogenetic characteristics of the cells formed after a meiosis II:
a) n: 2c DNA; b) n: lc DNA; c) 2n: 2c DNA.
b) n: lc DNA;
- The basic processes descending to chromosomes in a prophase of meiosis 1
spiralization; b) conjugation and a crossingover; c) despiralization.
a) spiralization; b) conjugation and a crossingover;
What is moved to cell poles in an anaphase of meiosis 1 ?
chromosomes; b) chromatids.
chromosomes
What is moved to cell poles in an anaphase of a meiosis II?
chromosomes; b) chromatids.
b) chromatids.
Features of a constitution of prokaryotes gene:
a)
has a mosaic construction; b) has no mosaic construction; c) the operon
contains some structural genes.
b) has no mosaic construction; c) the operon
contains some structural genes.
Features of prokaryote gene expression:
a)
group repression of genome genes is possible; b) group repression of
chromosome genes, genome and regulation of expression by steroid hormones
are not possible; c) the genes monitoring one biochemical reaction locate in one
place.
b) group repression of
chromosome genes, genome and regulation of expression by steroid hormones
are not possible; c) the genes monitoring one biochemical reaction locate in one
place.
Features of eukaryote gene construction:
has no mosaic constitution; b) operon consists some structural genes; c)
has a mosaic constitution, operon includes one structural gene.
c)
has a mosaic constitution, operon includes one structural gene.
Features of eukaryotes gene expression:
a)
group repression of genes of chromosome and genome are possible; b)
expression is regulated by steroid hormones; c) gene monitoring of one
biochemical reaction is locate in different parts of genome.
a)
group repression of genes of chromosome and genome are possible; b)
expression is regulated by steroid hormones; c) gene monitoring of one
biochemical reaction is locate in different parts of genome.
Role of t-RNA in life activity of a cell:
participation in transcription in a biosynthesis of proteins; b) participation
in translation in a biosynthesis of proteins; c) transport of amino acids to
ribosomes; d) participation in assembly of ribosomes.
b) participation
in translation in a biosynthesis of proteins;
c) transport of amino acids to
ribosomes;
Role of r-RNA in life activity of a cell:
a)
participation in a transcription in a biosynthesis of proteins; b)
participation in translation in a biosynthesis of proteins; c) participation in
construction of a nucleolus; d) participation in construction of ribosomes.
c) participation in
construction of a nucleolus;
d) participation in construction of ribosomes.
Role of Golgi complex in a cell:
a)
participates in uniform movement of chromosomes to cell poles; b)
formation of lysosomes; c) formation of inclusions; d) excretory and secretory
functions.
b)
formation of lysosomes; c) formation of inclusions; d) excretory and secretory
functions.
Role of centrioles in a cell:
formation of the mitotic spindle; b) formation of lysosomes; c) uniform
distribution of chromosomes in a mitosis and a meiosis; d) excretory function.
formation of the mitotic spindle;
c) uniform
distribution of chromosomes in a mitosis and a meiosis;
Role of telomeres in chromosomes:
a)
participate in division of a cell; b) provide satiation of chromosomes; c)
preserve a chromosome as discrete unit; d) interfere with bond of chromosomes
or their fragments among themselves.
b) provide satiation of chromosomes; c)
preserve a chromosome as discrete unit; d) interfere with bond of chromosomes
or their fragments among themselves.
Periods of an interphase:
a) presynthetic, synthetic, postsynthetic; b) postmitotic, premitotic; c) synthetic,
postsynthetic.
a) presynthetic, synthetic, postsynthetic
Stages of meiosis I prophase:
a)
leptonemm, zygonemm, diplonemm, diakinesis, pahynemm; b)
zygonemm, pahynemm, leptonemm, diplonemm, diakinesis; c) leptonemm,
zygonemm, pahynemm, diplonemm, diakinesis.
c) leptonemm,
zygonemm, pahynemm, diplonemm, diakinesis.
The periods of a spermatogenesis:
reproduction, growth, formation; b) reproduction, formation, maturation;
c) growth, maturation, formation; d) reproduction, growth, maturation,
formation.
d) reproduction, growth, maturation,
formation.
Features of prokaryote gene expression:
a)
group repression of genome genes is possible; b) group repression of
chromosome genes, genome and regulation of expression by steroid hormones
are not possible; c) the genes monitoring one biochemical reaction locate in one
place.
b) group repression of
chromosome genes, genome and regulation of expression by steroid hormones
are not possible; c) the genes monitoring one biochemical reaction locate in one
place.
Function of structural genes:
contain the information on synthesis t-RNA and г-RNA; b) increase or
decrease the speed of biochemical reactions; c) contain the information on
structure of protein-repressor; d) contains the information of polypeptide
structure.
d) contains the information of polypeptide
structure.
