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- Question
Biological membranes are composed of
Options- A. Phospholipids
- B. Proteins
- C. Carbohydrate groups
- D. All of the above
- Correct Answer
- All of the above
- 1. Which of the following statements about the cytoskeleton is FALSE?
Options- A. The bacterial cytoskeleton is not required for cell division and DNA segregation
- B. The cytoskeleton is made up of two types of protein filament
- C. Protein monomers that are held together with covalent bonds to form cytoskeletal filaments
- D. The cytoskeleton of a cell can change in response to the environment Discuss
- 2. What is the heaviest internal organ in the human body?
Options- A. Skin
- B. Lungs
- C. Heart
- D. Liver Discuss
- 3. Which of the following is not true of graded potentials?
Options- A. They can form on receptor endings
- B. They increase amplitude as they move away from the stimulus point
- C. They are short-lived
- D. They can be called postsynaptic potentials Discuss
- 4. All of the following are fat-soluble vitamins except
Options- A. Vitamin C
- B. Vitamin D
- C. Vitamin A
- D. Vitamin K Discuss
- Vitamin A
- Vitamin D
- Vitamin E
- Vitamin K
- 5. Gastrulation is the process that directly forms the
Options- A. Ectoderm
- B. Endoderm
- C. Mesoderm
- D. All of the above Discuss
- 6. Steroid hormones exert their action by
Options- A. entering the cell and activating mitichondrial DNA
- B. binding cell receptors
- C. activating hypothalmic release of regulating hormones
- D. entering the nucleus of a cell and initiating or altering the expression of a gene Discuss
- 7. In a nucleosome, the DNA is wrapped around
Options- A. ribosomes
- B. thymine dimer
- C. histones
- D. polymerase Discuss
- 8. Which process requires no energy from the cell?
Options- A. Osmosis
- B. Diffusion
- C. Both A & B
- D. None of the above Discuss
- 9. As an infant, the ability to produce antibodies is
Options- A. about 80% of that of an adult
- B. nonexistent
- C. limited
- D. the same as an adult Discuss
- 10. Another name for a bundle of nerve fibers is
Options- A. Axon
- B. Tract
- C. Fascicles
- D. None of the above Discuss
Biology problems
Search Results
Correct Answer: Protein monomers that are held together with covalent bonds to form cytoskeletal filaments
Explanation:
Protein monomers that are held together with covalent bonds to form cytoskeletal filaments is the false statement about the cytoskeleton in the given options.
Correct Answer: Liver
Correct Answer: They increase amplitude as they move away from the stimulus point
Explanation:
Graded potentials are changes in membrane potential that vary in size, as opposed to being all-or-none.
In the given options, They increase amplitude as they move away from the stimulus point is not true about the graded potentials.
Correct Answer: Vitamin C
Explanation:
Fat-soluble vitamins except are the vitamins that are not soluble in water and are only absorbed when taken with higher fat food.
There are 4 types of fat soluble vitamins. They are :
Water soluble vitamins are Vitamin B and Vitamin C.
Correct Answer: All of the above
Explanation:
Gastrulation rearranges the cells of the blastula and ultimately forms the three germ layers of the embryo. The primary layers that will form all of the major body and organ systems of the organism, these germ layers include the ectoderm, mesoderm, and endoderm.
Correct Answer: entering the nucleus of a cell and initiating or altering the expression of a gene
Explanation:
Steroid hormones exert their action by entering the nucleus of a cell and initiating or altering the expression of a gene.
Correct Answer: histones
Correct Answer: Both A & B
Explanation:
The processes both osmosis and diffusion come under passive transport and require no energy. The movement of solute from the region of higher concentration to the region of lower concentration is nothing but diffusion.
Correct Answer: limited
Explanation:
As an infant, the ability to produce antibodies is limited.
Correct Answer: Fascicles
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