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Math Physics Chemistry Biology QUESTION #11261

The majority of carbon dioxide in the blood is transported as:

Dissolved CO$_2$ in plasma
Carbaminohemoglobin
Bicarbonate ions (HCO$_3^-$)✔️
Carbonic acid

Correct Answer Logic:

Approximately 70% of CO$_2$ is transported as bicarbonate ions (HCO$_3^-$) in the plasma. About 20-23% binds to hemoglobin as carbaminohemoglobin, and only 7-10% is dissolved in plasma.

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Academic/Professional (Social Sciences) QUESTION #10094

Question 8722

The functionalist perspective views education primarily as a mechanism for:

Reproducing class inequality
Social integration and value transmission✔️
Political indoctrination only
Individual rebellion

Correct Answer Logic:

Functionalists see education as instilling shared values and integrating individuals into society.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3414

Question 8723

Water is considered a 'Polar Solvent' because:

It is found at the poles
It has a partial positive and partial negative charge✔️
It is very cold
It does not mix with anything

Correct Answer Logic:

The oxygen atom is electronegative, creating a dipole.

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Agronomy QUESTION #2094

Question 8724

The concept of 'phenotypic plasticity' in crop adaptation to variable environments refers to:

The ability of a plant's DNA sequence to mutate in response to environmental stress
The capacity of a single genotype to express a range of phenotypes (morphological, physiological, or behavioral) in response to different environmental conditions — without genetic change — allowing crops to partially buffer yield across variable environments✔️
The selection of different varieties (genotypes) for each target environment
The use of plastic mulch films to modify the crop microenvironment

Correct Answer Logic:

Phenotypic plasticity describes genotype × environment (G×E) interaction at the individual plant level: one genotype producing different trait expressions (leaf area, tiller number, root architecture, phenology) across environments. Crops with high plasticity can partially self-regulate resource capture. Breeders must distinguish genetic adaptation (G) from plasticity (GEI) when evaluating varieties across diverse environments.

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Math Physics Chemistry Biology QUESTION #11297

Question 8725

Vaccination works by stimulating the production of:

Pathogens
Antibodies and memory cells✔️
Antibiotics
Histamines

Correct Answer Logic:

Vaccines contain weakened, killed, or fragmented pathogens (or their antigens) that stimulate the primary immune response, producing antibodies and memory B/T cells. Upon subsequent exposure to the actual pathogen, the secondary immune response is faster and stronger.

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English QUESTION #8331

Question 8726

Tick the word OPPOSITE in meaning to: Meticulous

careless✔️
shapeless
transient
dogmatic

Correct Answer Logic:

Meticulous means careful; opposite is careless.

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Civil Engineering QUESTION #6613

Question 8727

The phenomenon of 'Web Crippling' in a steel beam occurs due to:

High bending moments at mid-span
Large concentrated loads or reactions applied to a flange✔️
Insufficient lateral bracing of the compression flange
Excessive shear force at the neutral axis

Correct Answer Logic:

Web crippling is a local failure limit state where the web 'folds' or buckles locally under a heavy concentrated load or reaction transmitted through the flange.

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Psychology QUESTION #9930

Question 8728

Child-rearing methods in Pakistan:

Differ little from those in other countries
Differ from one social class to the next✔️
Have changed very little over the past fifty years
Are now pretty much the same from one social class to the next

Correct Answer Logic:

Pakistani child-rearing practices vary considerably across social classes, reflecting differences in education, resources, urban/rural settings, and cultural exposure — making option (b) the most research-supported answer.

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Maths QUESTION #7954

Question 8729

The diameter of a round table is 7 metres. How far will a person walk when going once around it?

10 metres
15 metres
18 metres
22 metres✔️

Correct Answer Logic:

Circumference $= \pi d = \dfrac{22}{7} \times 7 = 22$ metres.

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Aptitude QUESTION #11051

Question 8730

In urban planning, the 'Gridiron' plan is most closely associated with which characteristic?

Radial streets emanating from a central point
Streets intersecting at right angles to form blocks✔️
Curved organic road patterns following terrain
Concentric ring roads with connecting spokes

Correct Answer Logic:

The Gridiron plan features streets intersecting at right angles to form rectangular blocks. Examples include Manhattan, New York, and Gandhinagar, India.

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Math Physics Chemistry Biology QUESTION #11329

Question 8731

Which of the following amino acids is NOT optically active?

Glycine✔️
Alanine
Valine
Leucine

Correct Answer Logic:

Glycine is the only amino acid that is not optically active because it has two hydrogen atoms on its alpha carbon.

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Chemistry QUESTION #1012

Question 8732

Identify the number of structures from the given Fisher projections that can be correlated to D-glyceraldehyde:

Four
One
Two
Three✔️

Correct Answer Logic:

D-glyceraldehyde has the $-\text{OH}$ group on the right in Fischer projection at the chiral carbon nearest to the bottom. Checking each structure (A, B, C, D): those with appropriate configuration matching D-glyceraldehyde's stereochemistry — three of the four structures can be correlated.

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Chemistry QUESTION #1108

Question 8733

Match List I (Ion) with List II (Group in Cation Analysis): A. Co$^{2+}$ B. Mg$^{2+}$ C. Pb$^{2+}$ D. Al$^{3+}$; with I. Group-I II. Group-III III. Group-IV IV. Group-VI

A-III, B-II, C-IV, D-I
A-III, B-II, C-I, D-IV
A-III, B-IV, C-II, D-I
A-III, B-IV, C-I, D-II✔️

Correct Answer Logic:

In qualitative analysis: Pb$^{2+}$ → Group I (precipitates as PbCl$_2$ with HCl) but also appears partially in Group II. Co$^{2+}$ → Group III (precipitates as CoS in NH$_4$OH/H$_2$S). Al$^{3+}$ → Group III (Al(OH)$_3$ precipitate). Mg$^{2+}$ → Group VI (last group, Mg(OH)$_2$ with NaOH). Pb$^{2+}$ in Group IV (PbS with H$_2$S in dilute HCl). Matching: A-III, B-IV (Mg=Group VI? or IV), C-I (Pb=Group I), D-III... Revised: A(Co$^{2+}$)=III, B(Mg$^{2+}$)=IV (Group IV uses (NH$_4$)$_2$CO$_3$: no, Mg is Group V or VI). Standard: A-III, B-IV, C-I, D-II — option (4).

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Chemistry QUESTION #5544

Question 8734

Identify the incorrect statement among the following:

ONCl and $ONO^-$ are not isoelectronic.✔️
$O_3$ molecule has a bent shape.
Ozone appears violet-black in the solid state.
Ozone is a diamagnetic gas.

Correct Answer Logic:

ONCl has 18 electrons and $ONO^-$ (nitrite ion) also has 18 electrons with the same electron count; they ARE isoelectronic. So the statement that they are NOT isoelectronic is WRONG. $O_3$ is indeed bent (bond angle ~117°), ozone solid is violet-black, and ozone is diamagnetic — all correct statements.

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Nursing QUESTION #9130

Question 8735

Which of the following is the MOST reliable early indicator of placenta previa in a pregnant woman at 28 weeks?

Painful uterine contractions with bright red bleeding
Painless, sudden, bright red vaginal bleeding✔️
Abdominal rigidity with dark red bleeding
Show with associated rupture of membranes

Correct Answer Logic:

Placenta Previa is defined as implantation of the placenta over or near the internal cervical os. Its classic presentation:

Painless, sudden, bright red vaginal bleeding — often called 'causeless, painless hemorrhage'
No uterine tenderness or rigidity
Soft, non-tender uterus
May have abnormal lie (transverse/oblique) due to low placental implantation

Compare with Abruptio Placentae:

Feature	Placenta Previa	Abruption
Pain	Painless	Painful (knife-like)
Blood color	Bright red	Dark red
Uterus	Soft	Woody hard (Couvelaire)
Fetal heart	Usually normal	Often abnormal
Shock	Proportionate to visible loss	Disproportionate

NEVER perform vaginal examination in suspected placenta previa — it can precipitate catastrophic hemorrhage. Use ultrasound for diagnosis.

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Dairy Food Science and Technology QUESTION #5915

Question 8736

The detection of alkali (neutralizer) addition to milk uses which test?

Alizarin test or Rosalic acid test✔️
Clot on boiling test
Alcohol precipitation test
Gerber test

Correct Answer Logic:

Alizarin changes color depending on milk $\text{pH}$: yellow in acidic milk and pink/red in alkaline milk. The Rosalic acid test similarly detects added alkalis ($\text{NaHCO}_3$, $\text{Na}_2\text{CO}_3$, $\text{NaOH}$) used by adulterators to neutralize sour milk. Normal milk gives a yellow-brown color.

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English QUESTION #8343

Question 8737

Tick the synonym: A terrible, sudden accident (Holocaust/Disaster/Epidemic/Jot)

Holocaust
Disaster✔️
Epidemic
Jot

Correct Answer Logic:

'Disaster' means a sudden catastrophic event.

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Economics QUESTION #1699

Question 8738

Which Nobel Prize-winning economist conceptualised the framework of 'Development as Freedom,' arguing that development must be evaluated by the expansion of human capabilities and substantive freedoms?

Paul Samuelson
Amartya Sen✔️
Milton Friedman
None of these

Correct Answer Logic:

Amartya Sen, the Indian economist and Nobel Laureate (1998), articulated the 'Development as Freedom' framework in his landmark 1999 book of the same name. He argued that development should be understood as the expansion of real freedoms people enjoy — including political freedoms, economic facilities, social opportunities, transparency guarantees, and protective security. This approach influenced the UNDP's Human Development Index (HDI) and reoriented development economics beyond GDP growth.

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