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- Question
Which of the following organs do not have blood vessels?
Options- A. Spleen
- B. Cornea
- C. Liver
- D. None of the above
- Correct Answer
- Cornea
ExplanationCorneas are only tissues that don?t have blood vessels. Tissues are the level cellular organization in the human body which lies between cells and a complete organ. Tissues of similar cells group together to form an organ.
There are four types of tissues. They are :
Epithelial,
Connective,
Muscular, and
Nervous tissue.
- 1. Which of the following statements about vitamins is true?
Options- A. Vitamins have a small caloric value
- B. Vitamins can serve as an energy supply for the body if certain criteria are met
- C. Like protein and some minerals, vitamins contribute to the structure of the body
- D. Vitamins are indispensable for the maintenance of optimal health Discuss
- 2. Which of the following does nutritional genomics study?
Options- A. how certain nutrients affect an individual's gene expression
- B. the precise amount of micronutrients the body needs
- C. the protein content of an individual
- D. the genetic sequence of an individual's genome Discuss
- 3. Which of the following statements about enzymes is not true?
Options- A. all enzymes have the same shape as their substrates
- B. enzymes are proteins
- C. enzymes work best at a specified ph
- D. the shape of an enzyme allows it to do its job Discuss
- 4. All of the following are true of neurons except that
Options- A. they conduct a nervous impulse
- B. they are a very specialized form of connective tissue
- C. thay are separated from one another by synapses
- D. When mature, they lose ability to divide Discuss
- 5. All of the following are fat-soluble vitamins except
Options- A. Vitamin C
- B. Vitamin A
- C. Vitamin D
- D. Vitamin K Discuss
- 6. Which organelles supply energy to the cell?
Options- A. Mitochondria
- B. Cytoplasm
- C. Ribosomes
- D. None of the above Discuss
- 7. Increasing the Alveolar ventilation rate will
Options- A. Increase the rate of carbon dioxide diffusion from the blood to the alveoli
- B. Decrease the partial pressure of oxygen in the alveoli
- C. Increase the partial pressure of carbon dioxide in the alveoli
- D. Have no effect on either partial pressure or diffusion rate of gases Discuss
- 8. The vitamin D deficiency disease in adults is known as
Options- A. Hypovitaminosis D
- B. Avitaminosis
- C. Scorbutus
- D. Petechiae Discuss
- 9. Which of the following is a characteristic of all angiosperms?
Options- A. double internal fertilization
- B. ovules that are not contained within ovaries
- C. complete reliance on wind as the pollinating agent
- D. free-living gametophytes Discuss
- 10. Select the correct statement about active and passive immunity.
Options- A. A vaccination is an example of the introduction of passive immunity into the body
- B. Active and passive humoral immunity are both mechanisms of adaptive immunity that useantibodies
- C. Immunological memory is established by passive immunization
- D. The antibodies utilized in active immunity are acquired from another organism Discuss
Biology problems
Search Results
Correct Answer: Vitamins are indispensable for the maintenance of optimal health
Explanation:
Vitamins are indispensable for the maintenance of optimal health is the only statement that is true about vitamins.
Correct Answer: how certain nutrients affect an individual's gene expression
Explanation:
Nutritional genomics is a science studying the effects of food and food constituents on gene expression and the relationship between human genome, nutrition and health. It is also known as nutrigenomics. It also studies how genetic variations affect the nutritional environment.
Correct Answer: all enzymes have the same shape as their substrates
Explanation:
All enzymes have the same shape as their substrates is the FALSE statement regarding enzymes.
Correct Answer: they are a very specialized form of connective tissue
Explanation:
All of the following are true of neurons except that they are a very specialized form of connective tissue.
Correct Answer: Vitamin C
Explanation:
A vitamin is an organic molecule that is an essential micronutrient that an organism needs in small quantities for the proper functioning of its metabolism.
There are 13 essential vitamins that our body need. They are categorized into
1. Water soluble
2. Fat soluble
Water-soluble vitamins dissolve in water, which means these vitamins and nutrients dissolve quickly in the body. Unlike fat-soluble vitamins, water-soluble vitamins are carried to the body?s tissues, but the body cannot store them.
Water-soluble vitamins are Vitamin B1, B2, B3, B5, B12, B6, B7 & B9 and Vitamin C.
Fat-soluble vitamins are soluble in fats. They are absorbed by fat globules that travel through the small intestines and into the general blood circulation within the body. Unlike water-soluble vitamins, fat-soluble vitamins are stored in the body when they are not in use.
Fat-soluble vitamins are - Vitamin A, D, E and K.
Correct Answer: Mitochondria
Explanation:
Mitochondria which is present in both plant and animal cells supplies energy to the cells and hence called as the powerhouse of the cell.
Correct Answer: Increase the rate of carbon dioxide diffusion from the blood to the alveoli
Explanation:
Increasing the Alveolar ventilation rate will increase the rate of carbon dioxide diffusion from the blood to the alveoli.
Correct Answer: Hypovitaminosis D
Explanation:
Vitamin D also known as Sunshine vitamin is produced in the body when our skin is exposed to sunlight. Its deficiency leads to a disease in which bone tissue doesn't properly mineralize leading to soft bones. The vitamin D deficiency disease in adults is known as Hypovitaminosis D.
Correct Answer: double internal fertilization
Explanation:
The flowering plants, also known as angiosperms, Angiospermae or Magnoliophyta, are the most diverse group of land plants. These are also seed producing plants like gymnosperms. In Angiosperms seeds are in flowers.
Correct Answer: Active and passive humoral immunity are both mechanisms of adaptive immunity that useantibodies
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