Which of the following is not true about enzymes:
They increase ∆G of reactions
They are usually made of amino acids
They lower the activation energy
... [Show More] of chemical reactions
Each one is specific to the particular substrate(s) to which it binds
A
An allosteric inhibitor does which of the following?
Binds to an enzyme away from the active site and changes the conformation of the active site, increasing its affinity for substrate binding
Binds to the active site and blocks it from binding substrate
Binds to an enzyme away from the active site and changes the conformation of the active site, decreasing its affinity for the substrate
Binds directly to the active site and mimics the substrate
c
AD
Which of the following analogies best describe the induced-fit model of enzyme-substrate binding?
A hug between two people
A key fitting into a lock
A square peg fitting through the square hole and a round peg fitting through the round hole of a children's toy
The fitting together of two jigsaw puzzle pieces.
A
The effect of high levels of ADP is to ________.
increase the activity of the enzyme
decrease the activity of the enzyme
have no effect on the activity of the enzyme
slow down the pathway
A
The control of which enzyme exerts the most control on glycolysis?
hexokinase
phosphofructokinase
glucose-6-phosphatase
aldolase
B
Which molecule must enter the Calvin cycle continually for the light-independent reactions to take place?
RuBisCO
RuBP
3-PGA
CO2
D
Where in eukaryotic cells does the Calvin cycle take place?
thylakoid membrane
thylakoid lumen
chloroplast stroma
granum
c
Which statement correctly describes carbon fixation?
the conversion of CO2 into an organic compound
the use of RuBisCO to form 3-PGA
the production of carbohydrate molecules from G3P
the formation of RuBP from G3P molecules
the use of ATP and NADPH to reduce CO2
A
https://bb.grcc.edu/bbcswebdav/pid-4631273-dt-content-rid-23389724_3/orgs/BIOLOGY.TUTORLAB/BI%20151%20Mitosis%20Overview%202018.pdf
...
https://bb.grcc.edu/bbcswebdav/pid-4681135-dt-content-rid-29033543_3/orgs/BIOLOGY.TUTORLAB/BI%20151%20Meiosis%20Tutorial%202018.pdf
...
Is cytokinesis part of mitosis?
No, cytokinesis is not part of mitosis but happens after
What is the main purpose of cytokinesis?
The main purpose of this process is to separate the cytoplasm and the cell to form two daughter cells that are genetically identical.
Is cytokinesis an animal or plant cell?
It is an animal cell - only animal cells form cleavage furrows, plant cells form a cell plate to separate daughter cells.
Interphase is part of Mitosis.
false
The centrioles directly attach to the chromosomes and push them towards the equator of the cell during metaphase.
False. The spindle fibers directly attach to the chromosomes and push them towards the
equator of the cell during metaphase.
Chromosomes are long, uncondensed pieces of DNA.
False. Chromatids are long, uncondesed pieces of DNA.
Mitosis produces diploid cells with 46 chromosomes
true
During S phase of the cell cycle, DNA is replicated.
True. During S phase of the cell cycle, DNA is replicated.
When a cell completes cytokinesis, two identical daughter cells are produced.
true
A cell spends most of its time in mitosis.
False. A cell spends most of its time in interphase.
During prophase, the mitotic spindle fibers form, chromatin condenses to chromosomes, and the nuclear envelope fragments.
true
Metaphase II
Homologous chromosomes line up at the
equator of the cell.
Prophase I
Crossing over occurs during this phase.
Anaphase I
Homologous pairs are moved to opposite poles by spindle fibers.
Telophase II
All chromosomes are in an unduplicated state.
Cytokinesis
This is not part of meiosis I or meiosis II.
Karyotyping allows health care providers to determine whether an individual has a genetic disorder, such as those containing more or less than the necessary chromosomes.
true
Crossing over occurs in metaphase II of meiosis II.
False. Crossing over takes place in prophase I of meiosis I.
The symbol for haploid is n, while the symbol for diploid is 2n
true
Cytokinesis is not part of meiosis I or meiosis II.
true
1.How many phases are there in meiosis I?
A. 3
B. 4
C. 5
D. 6
B - 4 phases (prophase, metaphase, anaphase, telophase)
2.How many chromosomes are there in each gamete? A.23 Replicated chromosomes
B.23 unreplicated chromosomes
C.46 unreplicated chromosomes
D.46 replicated chromosomes
B - 23 unreplicated chromosomes [Show Less]