D In Dryopteris the gametophytes give rise to sporophyte by gametic union and sporophyte give rise to gametophytes by forming haploid spores after meiosis. Gametophyte(n) \(\xrightarrow{\text { Gamitic union }}\) Sporophyte (2n) Sporophyte(2n) \(\xrightarrow{\text { meiosis }}\) Gametophyte(n) - Dryopteris is a pteridophyte plant commonly called wood ferns, male ferns or bucker ferns is a fern genus in the family Dryopteridaceae.
[AMU-2006]
Cell cycle and Cell Division
230744
Which of the following maintain the constant number of chromosomes generation after generation?
1 Meiosis
2 Endomitosis
3 Mitosis
4 Amitosis
Explanation:
A Meiosis maintain the constant number of chromosome generation after generation. -Amitosis is cell division by simple cleavage of the nucleus and division of the cytoplasm without spindle formation or appearance of chromosome -Endomitosis is one of the processes leading to endopolyploidy in which the stages of mitosis (prophase, metaphase, Anaphase) takes place inside the nuclear membrane and without spindle formation. In mammals endomitosis has been observed in the trophoblast of the placenta of the mouse, rat, rabbit.
[MGIMS Wardha-2003]
Cell cycle and Cell Division
230745
The anaphase promoting complex is activated by
1 M cdk cyclin
2 G cdk cyclin
3 \(\mathrm{S}\) cdk cyclin
4 Transcription factor
Explanation:
A The anaphase promoting complex is activated by M cdk cyclin. (Mitotic cyclin - dependent kinases) -M- cdk control entry into mitosis but their role during mitotic progression is less well understood. - S cdk cyclin that provides domicile essential for enzymatic activity. - Transcription factors are proteins involved in the process of converting or transcribing DNA into RNA. It is mostly located in the cytoplasm
[Manipal-2010]
Cell cycle and Cell Division
230752
Chromosome was discovered by
1 Hofmeister
2 Muller
3 Fleming
4 Hammering
Explanation:
C Chromosome was discovered by Walther Flemming in 1882. Chromosome is thread like structure present in the nucleus. DNA molecules are highly organized and packaged in eukaryotic cell to fit inside the nucleus.
D In Dryopteris the gametophytes give rise to sporophyte by gametic union and sporophyte give rise to gametophytes by forming haploid spores after meiosis. Gametophyte(n) \(\xrightarrow{\text { Gamitic union }}\) Sporophyte (2n) Sporophyte(2n) \(\xrightarrow{\text { meiosis }}\) Gametophyte(n) - Dryopteris is a pteridophyte plant commonly called wood ferns, male ferns or bucker ferns is a fern genus in the family Dryopteridaceae.
[AMU-2006]
Cell cycle and Cell Division
230744
Which of the following maintain the constant number of chromosomes generation after generation?
1 Meiosis
2 Endomitosis
3 Mitosis
4 Amitosis
Explanation:
A Meiosis maintain the constant number of chromosome generation after generation. -Amitosis is cell division by simple cleavage of the nucleus and division of the cytoplasm without spindle formation or appearance of chromosome -Endomitosis is one of the processes leading to endopolyploidy in which the stages of mitosis (prophase, metaphase, Anaphase) takes place inside the nuclear membrane and without spindle formation. In mammals endomitosis has been observed in the trophoblast of the placenta of the mouse, rat, rabbit.
[MGIMS Wardha-2003]
Cell cycle and Cell Division
230745
The anaphase promoting complex is activated by
1 M cdk cyclin
2 G cdk cyclin
3 \(\mathrm{S}\) cdk cyclin
4 Transcription factor
Explanation:
A The anaphase promoting complex is activated by M cdk cyclin. (Mitotic cyclin - dependent kinases) -M- cdk control entry into mitosis but their role during mitotic progression is less well understood. - S cdk cyclin that provides domicile essential for enzymatic activity. - Transcription factors are proteins involved in the process of converting or transcribing DNA into RNA. It is mostly located in the cytoplasm
[Manipal-2010]
Cell cycle and Cell Division
230752
Chromosome was discovered by
1 Hofmeister
2 Muller
3 Fleming
4 Hammering
Explanation:
C Chromosome was discovered by Walther Flemming in 1882. Chromosome is thread like structure present in the nucleus. DNA molecules are highly organized and packaged in eukaryotic cell to fit inside the nucleus.
D In Dryopteris the gametophytes give rise to sporophyte by gametic union and sporophyte give rise to gametophytes by forming haploid spores after meiosis. Gametophyte(n) \(\xrightarrow{\text { Gamitic union }}\) Sporophyte (2n) Sporophyte(2n) \(\xrightarrow{\text { meiosis }}\) Gametophyte(n) - Dryopteris is a pteridophyte plant commonly called wood ferns, male ferns or bucker ferns is a fern genus in the family Dryopteridaceae.
[AMU-2006]
Cell cycle and Cell Division
230744
Which of the following maintain the constant number of chromosomes generation after generation?
1 Meiosis
2 Endomitosis
3 Mitosis
4 Amitosis
Explanation:
A Meiosis maintain the constant number of chromosome generation after generation. -Amitosis is cell division by simple cleavage of the nucleus and division of the cytoplasm without spindle formation or appearance of chromosome -Endomitosis is one of the processes leading to endopolyploidy in which the stages of mitosis (prophase, metaphase, Anaphase) takes place inside the nuclear membrane and without spindle formation. In mammals endomitosis has been observed in the trophoblast of the placenta of the mouse, rat, rabbit.
[MGIMS Wardha-2003]
Cell cycle and Cell Division
230745
The anaphase promoting complex is activated by
1 M cdk cyclin
2 G cdk cyclin
3 \(\mathrm{S}\) cdk cyclin
4 Transcription factor
Explanation:
A The anaphase promoting complex is activated by M cdk cyclin. (Mitotic cyclin - dependent kinases) -M- cdk control entry into mitosis but their role during mitotic progression is less well understood. - S cdk cyclin that provides domicile essential for enzymatic activity. - Transcription factors are proteins involved in the process of converting or transcribing DNA into RNA. It is mostly located in the cytoplasm
[Manipal-2010]
Cell cycle and Cell Division
230752
Chromosome was discovered by
1 Hofmeister
2 Muller
3 Fleming
4 Hammering
Explanation:
C Chromosome was discovered by Walther Flemming in 1882. Chromosome is thread like structure present in the nucleus. DNA molecules are highly organized and packaged in eukaryotic cell to fit inside the nucleus.
D In Dryopteris the gametophytes give rise to sporophyte by gametic union and sporophyte give rise to gametophytes by forming haploid spores after meiosis. Gametophyte(n) \(\xrightarrow{\text { Gamitic union }}\) Sporophyte (2n) Sporophyte(2n) \(\xrightarrow{\text { meiosis }}\) Gametophyte(n) - Dryopteris is a pteridophyte plant commonly called wood ferns, male ferns or bucker ferns is a fern genus in the family Dryopteridaceae.
[AMU-2006]
Cell cycle and Cell Division
230744
Which of the following maintain the constant number of chromosomes generation after generation?
1 Meiosis
2 Endomitosis
3 Mitosis
4 Amitosis
Explanation:
A Meiosis maintain the constant number of chromosome generation after generation. -Amitosis is cell division by simple cleavage of the nucleus and division of the cytoplasm without spindle formation or appearance of chromosome -Endomitosis is one of the processes leading to endopolyploidy in which the stages of mitosis (prophase, metaphase, Anaphase) takes place inside the nuclear membrane and without spindle formation. In mammals endomitosis has been observed in the trophoblast of the placenta of the mouse, rat, rabbit.
[MGIMS Wardha-2003]
Cell cycle and Cell Division
230745
The anaphase promoting complex is activated by
1 M cdk cyclin
2 G cdk cyclin
3 \(\mathrm{S}\) cdk cyclin
4 Transcription factor
Explanation:
A The anaphase promoting complex is activated by M cdk cyclin. (Mitotic cyclin - dependent kinases) -M- cdk control entry into mitosis but their role during mitotic progression is less well understood. - S cdk cyclin that provides domicile essential for enzymatic activity. - Transcription factors are proteins involved in the process of converting or transcribing DNA into RNA. It is mostly located in the cytoplasm
[Manipal-2010]
Cell cycle and Cell Division
230752
Chromosome was discovered by
1 Hofmeister
2 Muller
3 Fleming
4 Hammering
Explanation:
C Chromosome was discovered by Walther Flemming in 1882. Chromosome is thread like structure present in the nucleus. DNA molecules are highly organized and packaged in eukaryotic cell to fit inside the nucleus.
