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- Question
Which of the following is an Autoimmune disease?
Options- A. Systematic lupus erythematosus
- B. Acute anaphylaxis
- C. Farmer's lung
- D. A heart attack
- Correct Answer
- Systematic lupus erythematosus
ExplanationAn autoimmune disease is a condition in which your immune system mistakenly attacks your body.
The immune system normally guards against germs like bacteria and viruses. When it senses these foreign invaders, it sends out an army of fighter cells to attack them. Normally, the immune system can tell the difference between foreign cells and your own cells.
In an autoimmune disease, the immune system mistakes part of your body ? like your joints or skin ? as foreign. It releases proteins called autoantibodies that attack healthy cells. Some autoimmune diseases target only one organ. Type 1 diabetes damages the pancreas. Other diseases, like lupus, affect the whole body.
Hence, Systematic lupus erythematosus is an autoimmune disease that affects multiple organs.
- 1. In which of the following organelles does photosynthesis take place?
Options- A. Miochondria
- B. Chloroplast
- C. Central Vacuole
- D. Ribosome Discuss
- 2. Which statement about capillaries is correct?
Options- A. their walls are covered with cilia
- B. they warm and humidify inhaled air
- C. their walls are only one cell thick
- D. they move mucus through the lungs Discuss
- 3. What sugar is found in RNA?
Options- A. Deoxyribose
- B. Ribose
- C. Pentose
- D. Sucrose Discuss
- 4. What are the building blocks of Nucleic Acids?
Options- A. Pentose Sugar
- B. DNA
- C. RNA
- D. Nucleotides Discuss
- 5. Do plant cells have Mitochondria?
Options- A. Yes
- B. No
- C. Can't be determined
- D. None Discuss
- 6. What is the correct order for Respiration?
Options- A. Election transport chain ? Krebs? cycle ? glycolysis
- B. Glycolysis ? Krebs? cycle ? electron transport chain
- C. Glycolysis ? electron transport chain ? Krebs? cycle
- D. The Krebs? cycle - electron transport chain - glycolysis Discuss
- 7. Which statement best describes Arteries?
Options- A. They have thin walls and transport blood away from the heart
- B. They have thick walls and transport blood toward the heart
- C. They have thin walls and transport blood toward the heart
- D. They have thick walls and transport blood away from the heart Discuss
- 8. The First step of Bacterial Replication is
Options- A. Pinching of the plasma membrane
- B. Separation of daughter cells
- C. Attachment of the DNA to the plasma membrane
- D. DNA Replication Discuss
- 9. Which statement is one component of the cell theory?
Options- A. DNA is the basis of genetic transfer
- B. All living cells arise from pre-existing cells
- C. All cells are composed of same organelles
- D. Tissues are formed from combinations of cells Discuss
- 10. Which of the following is an example of polygenic inheritance?
Options- A. Skin pigmentation in humans
- B. Huntington?s disease in humans
- C. White and purple flower color in peas
- D. The ABO blood groups in humans Discuss
Biology problems
Search Results
Correct Answer: Chloroplast
Explanation:
Chloroplasts use energy from light to transform carbon dioxide and water into sugar and oxygen.
A green pigment located in membranes within the chloroplasts of plants and algae and in the membranes of certain prokaryotes.
Correct Answer: their walls are only one cell thick
Explanation:
Capillaries Tiny blood vessels connecting arteries to veins. These blood vessels carry oxygen
and nutrients to individual cells. Capillaries are the smallest blood vessels in the body, and have
walls only one or two cells thick. (Their diameter is 5 to 10 micrometers, or 5 to 10 millionths of
a meter.)
Capillaries connect arterioles and venules, which are the smaller extensions of the larger arteries and veins.
Correct Answer: Ribose
Explanation:
RNA - ribonucleic acid is a type of nucleic acid. The sugar contained in it is called Ribose.
Correct Answer: Nucleotides
Explanation:
The building blocks of the nucleic acids are "Nucleotides".
Each nucleotide are composed of three parts. They are ::
1.Pentose sugar
2.Nitrogenous bases
3.Phosphoric acid.
Correct Answer: Yes
Explanation:
Yes, plant cells have Mitochondria.
While plant cells have chloroplasts to photosynthesize, they also require ATP for cellular functions, and do use oxygen to break down some of the sugar they produce in order to generate that ATP. They need mitochondria for this.
In particular, at night when there is no light, plants undergo cellular respiration since there is no sunlight to photosynthesize.
They do, however, produce far more sugar and oxygen through photosynthesis than they use up in respiration.
Correct Answer: Glycolysis ? Krebs? cycle ? electron transport chain
Correct Answer: They have thick walls and transport blood away from the heart
Explanation:
Because arteries have to have thick walls for use of protection. Its when you get to veins where the walls get thinner. And the use of the heart is to pump blood to all of the cells and organs in the body so it would be to transport blood away from the heart.
i.e.
Arteries = Away from the Heart
Veins = Back to the Heart.
Correct Answer: DNA Replication
Explanation:
The First step of Bacterial Replication is DNA Replication.
DNA must be copied in order to proceed.
Correct Answer: All living cells arise from pre-existing cells
Explanation:
All living cells arise from pre-existing cells is one component of the cell theory.
The Cell Theory is one of the basic principles of biology.
The Cell Theory states:
1. All living organisms are composed of cells. They may be unicellular or multicellular.
2. The cell is the basic unit of life.
3. Cells arise from pre-existing cells.
Correct Answer: Skin pigmentation in humans
Explanation:
Polygenic inheritance involves the determination of a particular phenotypic characteristic by many genes, called polygenes(group of genes influencing a quantitative characteristic), each having a small effect individually.
Height and skin colour in humans are examples of Polygenic characters.
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