Biology problems
- 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 Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
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.
- 2. Biological membranes are composed of
Options- A. Phospholipids
- B. Proteins
- C. Carbohydrate groups
- D. All of the above Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: All of the above
- 3. 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 Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
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.
- 4. In a nucleosome, the DNA is wrapped around
Options- A. ribosomes
- B. thymine dimer
- C. histones
- D. polymerase Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: histones
- 5. Which process requires no energy from the cell?
Options- A. Osmosis
- B. Diffusion
- C. Both A & B
- D. None of the above Also asked in: AIEEE, Bank Exams, Analyst
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.
- 6. 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 Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
Correct Answer: limited
Explanation:
As an infant, the ability to produce antibodies is limited.
- 7. Another name for a bundle of nerve fibers is
Options- A. Axon
- B. Tract
- C. Fascicles
- D. None of the above Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: Fascicles
- 8. Best suited for areas subject to friction, the epithelial tissue is called as
Options- A. transitional
- B. simple columnar
- C. straited squamous
- D. areolar Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: straited squamous
Explanation:
The number of cell layers and cell types together give rise to 6 different types of epithelial tissue.
1. Simple squamous epithelia
2. Simple cuboidal epithelia
3. Simple columnar epithelia
4. Stratified squamous epithelia
5. Stratified cuboidal epithelia
6. Stratified columnar epithelia
Stratified squamous epithelia is best suited for areas subject to friction.
- 9. Which of the following cannot add fat to the body?
Options- A. Vitamins
- B. Carbohydrates
- C. Water
- D. Proteins Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: Water
Explanation:
A nutrient is a substance used by an organism to survive, grow, and reproduce. These are compounds in foods essential to life and health, providing us with energy.
There are two types of nutrients:
1. Organic Nutrients
2. Inorganic Nutrients
Carbohydrates (CHO), Lipids (fats), Proteins and Vitamins come under organic nutrients as they contain carbon. These can add fat to the body.
Minerals and Water come under inorganic nutrients as they lack in carbon. These cannot add fat to the body.
- 10. Cadaver refers to ___a clinically
Options- A. alive human being
- B. a dead human body used for anatomy
- C. a live human being used for trial
- D. resurrected human body Also asked in: Bank Exams, AIEEE, Bank PO
Correct Answer: a dead human body used for anatomy
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