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BIOLOGY XII > cell cycle > Flashcards

cell cycle Flashcards

1
Q

cytoskeleton is made of

A

microtubules and microfilaments

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2
Q

microtubules are composed of

A

tubulin protein

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3
Q

What is synthesized in G1 phase

A

Cell organelles(most)
proteins
RNA
nucleotides

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4
Q

What is synthesized in S phase

A

DNA
Centriole
Histone

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5
Q

What is synthesized in G2 phase

A

Tubulin(for spindle formation)
mitochondria
chloroplast
golgi complex

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6
Q

_______lasts more than 95% of cell cycle

A

Interphase

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7
Q

_________ cell stage may last up to months or years in oocytes of some vertebrates

A

Diplotene

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8
Q

synapsis forms in which stage

A

zygotene

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9
Q

Crossing over occurs in which stage

A

Pachytene

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10
Q

Dissolution of synaptonemal complex and chiasmata occurs in which stage

A

Diplotene

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11
Q

Terminalisation of chiasmata occurs in which stage

A

Diakinesis

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12
Q

Amino acids that are exception to degeneracy

A

Tryptophan

methionine

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13
Q

Activator for both RubisCO and PEP

A

Mg2+

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14
Q

Activator of Alcohol dehydrogenase

A

Zn+2

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15
Q

Activator of Nitrogenase

A

Mo

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16
Q

The INNER wall of guard cells are _____(thin/thick) and ______(elastic/rigid)

A

Inner wall of guard cells are __thick___ and ___elastic___

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17
Q

Outer walls of guard cells are ____(thick/thin)

A

Thin

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18
Q

Govt of India passed Environment protection Act in

A

1986

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19
Q

Air (Prevention and Control of Pollution)Act came into force in

A

1981

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20
Q

Air (Prevention and Control of Pollution)Act was amended to include noise as an air pollutant in the year

A

1987

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21
Q

In 1990s Delhi ranked ____ among the ___ most polluted cities in the world

A

In 1990s Delhi ranked __4th__ among the _41__ most polluted cities in the world

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22
Q

Euro III norms stipulate that sulphur be controlled at _____ppm in diesel and ___ppm in petrol

A

Euro III norms stipulate that sulphur be controlled at _350____ppm in diesel and _150__ppm in petrol

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23
Q

Euro III norms stipulate that aromatic hydrocarbons are to be contained at _______% of the concerned fuel

A

Euro III norms stipulate that aromatic hydrocarbons are to be contained at ___42____% of the concerned fuel

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24
Q

Goal of Euro III norms is to reduce sulphur to _______ppm in petrol and diesel and bring it down the level to _____%

A

Goal of Euro III norms is to reduce sulphur to __50_____ppm in petrol and diesel and bring it down the level to ___35__%

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25
Biomagnification is well known for _____ and ______
Biomagnification is well known for __Mercury___ and __DDT____
26
DDT in water is
0.003ppb
27
DDT in zooplankton is
0.04ppm
28
DDT in small fish is
0.5ppm
29
DDT in Large fish is
2ppm
30
DDT in Fish eating birds is
25ppm
31
Vitamin B complex is fat soluble or insoluble?
Insoluble
32
Unequivocal proof of DNA as genetic material came from studies on a
Bacterial virus
33
In Kranz anatomy the bundle sheath cells have ____walls,_______intercellular spaces, and ______chloroplasts
In Kranz anatomy the bundle sheath cells have _thick___walls,___NO____intercellular spaces, and _large number of _____chloroplasts
34
Detrivores break detritus into smaller particles by process called
Fragmentation
35
Leaching
water soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts
36
Bacterial and fungal enzymes degrade detritus into simple inorganic substances in a process called
Catabolism
37
Humification
Accumulation of dark amorphous substance called humus that is highly resistant to microbial action and decomposes at extremely slow rate
38
Important steps in the process of decomposition are
``` Fragmentation Leaching Catabolism Humification Mineralisation ```
39
Common cold is not cured by antibiotics because
It is caused by a virus
40
Pancreatic juice contains
``` trypsinogen chymotrypsinogen procarboxypeptidases amylases lipases nucleases ```
41
Enterokinase role
secreted by intestinal mucosa that converts trypsinogen into active trypsin
42
Bile is released into
dudodenum
43
Bile contains
Pigments(bilurubin & bili-verdin) cholesterol phospholipids NO ENZYMES
44
Goblet cells location and function
Located in intestinal mucosa and secretes mucus
45
Brunners gland location and function
Located in sub mucosa of intestine | helps maintain alakaline pH -7.8 in the intestine
46
peptic or chief cells
+nt in stomach mucosa and secrete pepsinogen
47
Parietal or oxyntic cells
+nt in mucosa of stomach and secretes HCl and intrinsic factor essential for absorption of Vitamin B12
48
Simultaneous deficiency of proteins and calories
Marasmus
49
Marasmus is found in children ___ than a yr in age and Kwashiorkar is seen in child _____than 1 yr in age
Marasmus is found in children _less__ than a yr in age and Kwashiorkar is seen in child __more___than 1 yr in age
50
Unlike marasmus in Kwashiorkar
some fat is still left under the skin
51
Tidal volume
500mL
52
IRV
2500-3000mL
53
ERV
1000-1100mL
54
Residual volume
1100-1200mL
55
pO2 in atmospheric air
159mmHg
56
pCO2 in atmospheric air
0.3mmHg
57
pO2 in Alveoli
104mmHg
58
pO2 in deoxygenated blood
40mmHg
59
pO2 in oxygenated blood
95mmHg
60
pO2 in tissues
40mmHg
61
pCO2 in Alveoli
40mmHg
62
pCO2 in deoxygenated blood
45mmHg
63
pCO2 in oxygenated blood
40mmHg
64
pCO2 in tissues
45mmHg
65
97% of O2 in our body is transported
RBCs in blood
66
3%of O2 in our body is transported
in dissolved state thro plasma
67
20-25% of CO2 in our body is transported
by RBCs
68
70% of CO2 in our body is transported
as bicarbonates
69
7% of CO2 in our body is transported
in dissolved state thro plasma
70
CO2 carried by haemoglobin is called
carbamino-haemoglobin
71
Every _____mL of deoxygenated blood delivers approx ____mL of CO2 to the alveoli
Every _100____mL of deoxygenated blood delivers approx _4___mL of CO2 to the alveoli
72
Respiratory rhythm centre is present in
Medulla
73
Pneumotaxic centre is +nt in
Pons | It can moderate the functions of the respiratory rhythm centre
74
Role of O2 in regulation of respiratory rhythm centre is quite______(significant/insignificant)
insignificant
75
Acidophils is _____% of TLC
2-3%
76
Basophils is _____% of TLC
0.5-1%
77
Neutrophils is _____% of TLC
60-65%
78
Monocytes is _____% of TLC
6-8%
79
Lymphocytes is _____% of TLC
20-25%

BIOLOGY XII (18 decks)

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