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- Question
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
- Correct Answer
- All living cells arise from pre-existing cells
ExplanationAll 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.
- 1. 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
- 2. 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
- 3. 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
- 4. Which of the following is an Autoimmune disease?
Options- A. Systematic lupus erythematosus
- B. Acute anaphylaxis
- C. Farmer's lung
- D. A heart attack Discuss
- 5. In which of the following organelles does photosynthesis take place?
Options- A. Miochondria
- B. Chloroplast
- C. Central Vacuole
- D. Ribosome Discuss
- 6. 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
- 7. A pulse can be detected most easily in
Options- A. a vein
- B. a lacteal
- C. an artery
- D. a capillary Discuss
- 8. Why are yeast cells frequently used as hosts for cloning?
Options- A. they are eukaryotic cells
- B. they do not have plasmids
- C. only yeast cells allow the gene to be cloned
- D. they easily form colonies Discuss
- 9. Which of the following vitamin helps in clotting of blood?
Options- A. Vitamin K
- B. Vitamin D
- C. Vitamin B1
- D. Vitamin B2 Discuss
- 10. Which of the following statements about ddntps is true?
Options- A. They have a hydrogen at the 3? carbon of the sugar.
- B. DNA polymerase can add a new dNTP to a 3? ddNTP.
- C. They have a free 3?-hydroxyl group on the ribose sugar.
- D. They have an oxygen at the 2? carbon of the ribose sugar. Discuss
Biology problems
Search Results
Correct Answer: DNA Replication
Explanation:
The First step of Bacterial Replication is DNA Replication.
DNA must be copied in order to proceed.
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: Glycolysis ? Krebs? cycle ? electron transport chain
Correct Answer: Systematic lupus erythematosus
Explanation:
An 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.
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: 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.
Correct Answer: an artery
Explanation:
A pulse can be detected most easily in Arteries as they are under much greater pressure than veins because they are carrying blood away from the heart which is the pumping machine to force blood to move to all of the body.
Every time the hear contracts, it can be felt in an artery where a surge of blood has just been forced.
A capillary is too small to feel a pulse and a lacteal is part of the lymphatic system found in the small intestine.
Correct Answer: they are eukaryotic cells
Explanation:
If you were to produce a protein in bacterial cloning systems, you would not get the same post transcriptional and post translational modifications because the prokaryotic and eukaryotic systems work differently on the modifications.
Thus human recombinant protein genes are usually cloned in yeast cells. Also since they have a short generation time, they can be easily culture.
Correct Answer: Vitamin K
Explanation:
Vitamin K helps in clotting of blood. It is used by the body to help blood clot.
Warfarin (Coumadin) is used to slow blood clotting. By helping the blood clot, vitamin K might decrease the effectiveness of warfarin (Coumadin).
Correct Answer: They have a hydrogen at the 3? carbon of the sugar.
Explanation:
ddNTPs - Dideoxynucleotides and abbreviated as ddNTPs.
They are chain-elongating inhibitors of DNA polymerase, used in the Sanger method for DNA sequencing.
They have a hydrogen at the 3? carbon of the ribose sugar.
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