Nutrition and Nutritional requirement Questions in English

(D) Vitamin $A$ (Retinol) is essential for the synthesis of rhodopsin,a pigment found in the rod cells of the retina that is responsible for vision in low light.
$1$. Deficiency of Vitamin $A$ leads to night blindness (nyctalopia),which is the inability to see clearly in dim light.
$2$. It also causes xerophthalmia,which involves the drying and keratinization of the cornea and conjunctiva due to the loss of mucus-secreting goblet cells.
Therefore,all the mentioned conditions are associated with Vitamin $A$ deficiency.

(D) Vitamin $D$ (calciferol) plays a crucial role in calcium homeostasis.
$1$. It promotes the absorption of calcium $(Ca^{+2})$ and phosphorus from the digestive tract.
$2$. Deficiency of Vitamin $D$ in children leads to rickets,characterized by soft and weak bones.
$3$. It regulates bone mineralization by increasing the activity of osteoblasts (bone-forming cells).
Therefore,all the given statements are correct.

(A) The basic requirements of humans are generally considered to be $3$: food,clothing,and shelter. These are the fundamental necessities required for human survival and well-being.

(C) Absorptive nutrition is a process where organisms secrete digestive enzymes into their environment to break down organic matter and then absorb the resulting nutrients through their cell membranes.
This mode of nutrition is characteristic of organisms that do not ingest food particles (unlike holozoic nutrition).
Parasitic organisms obtain nutrients from a living host,while saprophytic organisms obtain nutrients from dead and decaying organic matter.
Both of these modes rely on the absorption of pre-digested nutrients,making them the primary types of absorptive nutrition.

(C) Nutrition is the process by which organisms obtain or synthesize food. Modes of nutrition are generally classified based on how organisms acquire nutrients. Ingestion is a specific mode of nutrition (holozoic nutrition) where an organism takes in complex organic substances. Producers,decomposers,and consumers are categories of organisms based on their trophic roles in an ecosystem,not modes of nutrition themselves.

(C) Living organisms require energy to perform various metabolic activities,growth,and reproduction.
This energy is primarily obtained through the process of nutrition,where organisms consume food.
Food serves as the fundamental source of chemical energy (in the form of $ATP$) which is released during cellular respiration.
Therefore,food is the primary source of energy for all living organisms.

(D) : Marasmus is a form of protein-energy malnutrition that is common in infants under one year of age.
It develops due to a simultaneous deficiency of proteins and total calories.
Unlike kwashiorkor,which typically affects older children and is primarily a protein deficiency,marasmus involves a severe lack of all energy-providing nutrients.
It can be managed and cured by providing a diet rich in adequate proteins,fats,and carbohydrates.

(A) The correct answer is $A$. Retinol (vitamin $A$) is a fat-soluble vitamin,and its deficiency leads to xerophthalmia (dryness and thickening of the cornea).
$B$. Cobalamine (vitamin $B_{12}$) is a water-soluble vitamin,and its deficiency causes pernicious anaemia,not beri-beri. Beri-beri is caused by the deficiency of vitamin $B_1$ (thiamine).
$C$. Calciferol (vitamin $D$) is a fat-soluble vitamin,but its deficiency causes rickets (in children) or osteomalacia (in adults),not pellagra. Pellagra is caused by the deficiency of vitamin $B_3$ (niacin).
$D$. Ascorbic acid (vitamin $C$) is a water-soluble vitamin,and its deficiency causes scurvy. Since the question asks for a fat-soluble vitamin and its related deficiency disease,only option $A$ is correct.

(C) Vitamin $A$ (retinol) is primarily found in yellow and orange-colored vegetables and dark green leafy vegetables.
$I.$ Carrot is a very rich source of $\beta$-carotene,which the body converts into vitamin $A$.
$II.$ Lemon is a rich source of vitamin $C$,not vitamin $A$.
$III.$ Beans are generally good sources of protein and fiber,but not significant sources of vitamin $A$.
$IV.$ Spinach is a dark green leafy vegetable and is an excellent source of vitamin $A$.
Therefore,both Carrot $(I)$ and Spinach $(IV)$ are rich sources of vitamin $A$.

(C) $Marasmus$ is a form of protein-energy malnutrition caused by a deficiency of both proteins and calories.
Symptoms include extreme emaciation of the body,thinning of limbs,skin becoming dry,thin and wrinkled,and stunted growth.
Impairment of brain and mental faculties is also observed in severe cases.
Swelling of body parts (edema) is a characteristic symptom of $Kwashiorkor$,which is caused by protein deficiency alone,not $Marasmus$.
Therefore,swelling of body parts is not a symptom of $Marasmus$.

(C) Protein-Energy Malnutrition $(PEM)$ is a condition caused by a deficiency of protein and/or calories in the diet.
$Kwashiorkor$ is a specific form of $PEM$ caused by a severe deficiency of protein in the diet,typically occurring in children after weaning.
$Asthma$ is a respiratory condition.
$Hypertension$ refers to high blood pressure.
$Jaundice$ is a condition characterized by the yellowing of the skin and eyes due to high levels of bilirubin.
Therefore,the correct answer is $Kwashiorkor$.

(C) Marasmus is a form of protein-energy malnutrition $(PEM)$ caused by a severe deficiency of both proteins and calories. It typically affects infants under one year of age.
Kwashiorkor is also a form of $PEM$,but it is specifically caused by a deficiency of proteins alone,often occurring when a child is weaned from breast milk to a diet high in carbohydrates but low in protein.
Therefore,the correct distinction is that Marasmus involves a deficiency of both proteins and calories,whereas Kwashiorkor is primarily due to protein deficiency without a significant calorie deficiency.

(C) Marasmus is a form of protein-energy malnutrition $(PEM)$.
It is caused by a deficiency of both proteins and total caloric intake.
It typically affects infants less than a year old.
It often occurs when mother's milk is replaced by other foods which are poor in both proteins and caloric value,often due to a subsequent pregnancy or childbirth while the older infant is still young.
Option $C$ is incorrect because Marasmus is caused by a deficiency of both proteins and calories,not just lipids.

(B) The gross calorific value is the total amount of heat liberated from the complete combustion of $1 \, g$ of food in a bomb calorimeter (a closed metal chamber filled with $O_2$).
For proteins,the gross calorific value is $5.65 \, kcal/g$.
In contrast,the physiological value of proteins is $4.0 \, kcal/g$.

(D) $PEM$ stands for Protein-Energy Malnutrition. It is a condition that occurs due to a deficiency of proteins and total food calories. It is most commonly observed in children, particularly in infants, and is generally not present in healthy, well-nourished adult humans. Malaria, pneumonia, and indigestion can occur in adults at any stage of life.

(C) Marasmus is a protein-energy malnutrition $(PEM)$ disorder caused by a deficiency of both proteins and calories.
It typically affects infants less than $1$ year of age.
Option $A$ is a common cause of marasmus.
Option $B$ describes the physical symptoms of marasmus,such as dry,thin,and wrinkled skin.
Option $D$ is correct as the lack of essential nutrients impairs brain development.
Option $C$ is incorrect because marasmus is primarily observed in infants less than $1$ year old,whereas Kwashiorkor is typically seen in children older than $1$ year.

(C) Pellagra is a deficiency disease caused by a lack of $Vitamin B_3$ (Niacin or Nicotinamide).
Symptoms of Pellagra are often described by the '$4Ds$': Dermatitis (thick,pigmented skin),Diarrhea,Dementia (irritability,confusion),and Death.
Swollen lips (cheilosis) and glossitis are also common clinical features associated with this deficiency.
Therefore,the correct pair is Nicotinamide - Pellagra.

(C) Vitamin $- C$,also known as ascorbic acid,is a water-soluble vitamin essential for the synthesis of collagen,a protein that helps in the formation of connective tissues,skin,and blood vessels.
Deficiency of Vitamin $- C$ leads to a condition known as scurvy,which is characterized by symptoms such as bleeding gums,weakness,fatigue,and poor wound healing.
Rickets is caused by a deficiency of Vitamin $- D$.
Pellagra is caused by a deficiency of Vitamin $B_3$ (niacin).
Therefore,Vitamin $- C$ prevents scurvy.

(C) Kwashiorkor is a severe form of malnutrition caused by a deficiency of protein in the diet. It is most commonly seen in children in developing countries. Symptoms include edema (swelling),a bloated abdomen,and skin changes. Eczema is a skin condition,cirrhosis is a liver disease,and night blindness is caused by a deficiency of Vitamin $A$.

(A) The correct answer is $A$.
Vitamin $K$ is essential for blood clotting, and its deficiency leads to excessive bleeding.
Beriberi is caused by the deficiency of Vitamin $B_1$ (Thiamine), not Vitamin $K$.
Vitamin $D$ deficiency causes Rickets in children.
Vitamin $C$ deficiency causes Scurvy.
Vitamin $A$ deficiency causes Xerophthalmia (dryness of the eyes).

(A) The correct answer is $A$.
Vitamin $B_6$ (Pyridoxine) deficiency leads to conditions like dermatitis, glossitis, and peripheral neuropathy, not Beriberi.
Beriberi is caused by the deficiency of Vitamin $B_1$ (Thiamine).
Vitamin $C$ deficiency causes Scurvy.
Vitamin $B_3$ (Niacin) deficiency causes Pellagra.
Vitamin $B_{12}$ (Cyanocobalamin) deficiency causes Pernicious anemia.

(A) Beriberi is a nutritional disorder caused by the deficiency of Vitamin-$B_1$ (Thiamine).
Statement $(b)$ is correct as it identifies the cause.
Statement $(d)$ is correct because polished rice lacks the outer layer (bran) which contains Vitamin-$B_1$,leading to deficiency in populations relying on it as a staple food.
Statement $(e)$ is correct as it lists the clinical symptoms of Beriberi,including neurological and cardiovascular complications.
Statement $(a)$ is incorrect as Beriberi is not specifically restricted to sub-Saharan Africa.
Statement $(c)$ describes Kwashiorkor (protein deficiency),not Beriberi.
Therefore,the correct statements are $(b), (d),$ and $(e)$.

(B) Kwashiorkor is a form of protein-energy malnutrition characterized by a severe deficiency of dietary protein.
Since meat,lentils,milk,and eggs are rich sources of high-quality proteins,they are recommended to patients suffering from Kwashiorkor to restore protein levels in the body.
Scurvy is caused by Vitamin $C$ deficiency.
Rickets is caused by Vitamin $D$ deficiency.
Anemia is typically associated with iron deficiency.

(D) Marasmus is a form of Protein-Energy Malnutrition $(PEM)$ that occurs in infants less than one year of age when breastfeeding is replaced by foods low in both proteins and total calories.
$1$. In $Marasmus$,there is impairment of growth and replacement of tissue proteins,extreme emaciation of the body,and thinning of limbs.
$2$. $Kwashiorkor$ is produced by protein deficiency unaccompanied by calorie deficiency,usually occurring in children older than one year.
$3$. $Rickets$ is caused by Vitamin $D$ deficiency.
$4$. $Pellagra$ is caused by Niacin (Vitamin $B_3$) deficiency.
Therefore,the correct answer is $Marasmus$.

(C) Xerophthalmia is a condition caused by a severe deficiency of Vitamin $A$.
In India,Vitamin $A$ deficiency is a major public health concern,particularly among children in lower socioeconomic groups who lack access to a balanced diet rich in fruits and vegetables.
It is considered a top priority for remedial action because it can lead to permanent blindness if left untreated.

(D) Kwashiorkor is a form of protein-energy malnutrition $(PEM)$ that occurs when there is a severe deficiency of protein in the diet,but calorie intake may be relatively adequate or slightly insufficient.
Unlike Marasmus,which is caused by a deficiency of both proteins and total calories,Kwashiorkor specifically results from protein deficiency not accompanied by calorie deficiency.
This condition is characterized by edema (swelling) due to low plasma protein levels,which leads to fluid retention in tissues.

(A) In many developing countries of South and South-East Asia,West and Middle Africa,the deficiency of protein and total food is widespread.
$PEM$ (Protein-Energy Malnutrition) affects the population during droughts and political instability.
$Marasmus$ and $Kwashiorkor$ are commonly seen in children.
$(i)$ $Marasmus$: It occurs due to a simultaneous deficiency of proteins and calories. It is seen in children below $1$ year of age. It occurs due to the replacement of mother's milk by other insufficient nutritious foods very early.
Symptoms: Protein deficiency,stunted growth,breakdown of tissue proteins,very weak body,thinning of limbs,and dry,thin,wrinkled skin. $A$ noticeable decrease is seen in growth rate and body weight. Brain growth and development are impaired.
$(ii)$ $Kwashiorkor$: It occurs due to protein deficiency. It is seen in children above $1$ year of age,caused by a diet high in calories but low in protein replacing mother's milk. Symptoms include: muscle wasting,thinning of limbs,impaired brain growth and development,but some fat remains deposited under the skin,and swelling (edema) occurs in some parts of the body.

(A) $(1)$ The physiological calorific value of carbohydrates is $4.0 \ kcal/g$, but the gross calorific value is $4.1 \ kcal/g$. The gross calorific value of proteins is $5.65 \ kcal/g$.
$(2)$ Marasmus is caused by a deficiency of both proteins and calories. Kwashiorkor is caused by protein deficiency alone, often occurring in the presence of adequate calorie intake.

(B) Vitamin $C$ and $D$ are essential for maintaining bone density.
Vitamin $C$ is crucial for the synthesis of collagen,which provides the structural framework for bone mineralization.
Vitamin $D$ is vital for the absorption of calcium from the digestive tract,which is necessary for bone strength and density.

(A) Vitamin $B_{1}$ is also known as thiamine.
Deficiency of thiamine leads to a disease called Beri-beri.
This condition affects the peripheral nervous system and the cardiovascular system.
Other options: Dermatitis is often associated with vitamin $B_{3}$ or $B_{6}$ deficiency,Scurvy is caused by vitamin $C$ deficiency,and Rickets is caused by vitamin $D$ deficiency.

(A) Vitamin $A$ is chemically known as retinol. It is also commonly referred to as xerophytol because its deficiency leads to a condition known as xerophthalmia (dryness of the eyes). Thiamine is Vitamin $B_1$,Riboflavin is Vitamin $B_2$,and Pyridoxine is Vitamin $B_6$.

(D) balanced diet consists of essential nutrients that the body requires for proper functioning,growth,and energy. These include carbohydrates,fats,proteins,vitamins,minerals,and water. Hormones are chemical messengers produced by the endocrine glands within the body and are not dietary constituents that must be consumed through food.

(A) Vitamin $E$ (tocopherol) is essential for the normal functioning of the reproductive system. Its deficiency leads to reproductive failure,often manifested as sterility or infertility in both males and females.

(B) Bleeding gums are a classic symptom of scurvy,which is caused by a deficiency of vitamin $C$.
Ascorbic acid is the chemical name for vitamin $C$.
Therefore,the deficiency of ascorbic acid leads to bleeding gums.

(B) The calorific value is defined as the amount of heat energy released by the complete combustion of $1 \ g$ of a substance in a bomb calorimeter.
The gross calorific values of the three major nutrients are:
$1$. Fats: $9.45 \ kcal/g$
$2$. Proteins: $5.65 \ kcal/g$
$3$. Carbohydrates: $4.1 \ kcal/g$
Therefore,the order of energy content is: Fats $>$ Proteins $>$ Carbohydrates. Thus,fats provide the highest calorific value.

(D) Pellagra is caused by the deficiency of vitamin-$B_{3}$ (niacin or nicotinic acid).
Vitamin-$B_{2}$ (riboflavin) deficiency typically causes ariboflavinosis,characterized by cheilosis,glossitis,and dermatitis.
Vitamin-$B_{12}$ (cyanocobalamin) deficiency leads to pernicious anaemia.
Vitamin-$B_{6}$ (pyridoxine) deficiency can lead to dermatitis.
Vitamin-$B_{1}$ (thiamine) deficiency causes beri-beri.
Therefore,the pair Vitamin-$B_{2}$ - Pellagra is incorrectly matched.

(A) Cyanocobalamine,also known as vitamin-$B_{12}$,is essential for the maturation of $RBC$s,$DNA$ synthesis,and myelin sheath formation.
Deficiency of vitamin-$B_{12}$ leads to pernicious anaemia,a condition where the body cannot produce enough healthy red blood cells.
It acts as a co-enzyme in various metabolic processes.
It is primarily found in animal products like fish,liver,eggs,and milk,and is notably absent in plant-based foods.

(D) Deficiency of calciferol or Vitamin-$D$ causes rickets in children and osteomalacia in adults.
This condition leads to weak,soft bones,skeletal distortions,and poor muscle development due to impaired calcium absorption.

(B) Nutrients are the chemical constituents of food,which are the primary requirement of life.
These can be grouped into two types: macronutrients,which include carbohydrates,fats,and proteins,and micronutrients or trace nutrients,which are required in small amounts by the body.
Minerals and vitamins fall under the category of micronutrients or trace components because they are essential for metabolic processes but are needed in very small quantities.

(C) Deficiency of vitamin-$D$ causes rickets in children and osteomalacia in adults.
Thiamine (Vitamin-$B_{1}$) deficiency causes beri-beri in humans and polyneuritis in animals.
Vitamin-$K$ (phylloquinone) deficiency causes bleeding disorders or haemorrhages.
Reduced fertility or sterility is caused by Vitamin-$E$ (tocopherol) deficiency.
Pellagra is caused by Niacin (Vitamin-$B_{3}$) deficiency.
Therefore,the combination of Vitamin-$K$ and Sterility is mismatched.

(C) Vitamin-$D$ is essential for the normal growth of the body and the formation of teeth and bones by facilitating the deposition of essential minerals like calcium in them.
Vitamin-$A$ is crucial for the maintenance of epithelial cells and the development of bones and teeth.
Calcium $(Ca^{2+})$ is the primary mineral component required for the structural integrity and formation of bones and teeth.
Therefore,a combination of Vitamin-$D$,$Ca^{2+}$,and Vitamin-$A$ is most effective for improving bone strength and growth.

(B) Retinol is the chemical name of vitamin-$A$.
Deficiency of vitamin-$A$ in the diet causes night blindness and xerophthalmia.
Xerophthalmia can progress to an advanced stage known as keratomalacia,which is characterized by the softening and keratinization of the cornea.

(D) Carbohydrates,fats,and proteins are known as macronutrients or proximate principles of food. These components constitute the primary energy source for the production of heat and the performance of various organic functions. They are required in large quantities by our body to maintain health and metabolic processes.

(D) Beri-beri is a disease caused by the deficiency of vitamin $B_{1}$,also known as Thiamine.
This condition is characterized by muscle degeneration,nerve inflammation,and cardiovascular issues.

(C) Vitamin-$A$ is a fat-soluble vitamin essential for vision and immune function.
Carrots $(I)$ are well-known for being rich in beta-carotene,which the body converts into vitamin-$A$.
Spinach $(IV)$ is a dark green leafy vegetable that is also an excellent source of vitamin-$A$ (in the form of carotenoids).
Lemons $(II)$ are primarily rich in vitamin-$C$.
Beans $(III)$ are primarily sources of protein and fiber.
Therefore,both carrots and spinach are rich sources of vitamin-$A$.

(B) Night blindness is a nutritional deficiency disease.
It generally occurs due to the deficiency of Vitamin-$A$ in the body,which is essential for the formation of rhodopsin,a pigment in the retina that helps in low-light vision.