Biology problems
- 1. What provides electrons for the light reactions?
Options- A. Water
- B. Oxygen
- C. Carbon dioxide
- D. Light Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: Water
Explanation:
Electrons are stripped from water in the light reactions of photosynthesis. Light provides the energy to excite electrons.
ATP and NADPH are both products of the light reactions and are used to power the Calvin cycle.
- 2. How many Nucleotides make up a Codon?
Options- A. 3
- B. 4
- C. 5
- D. 6 Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: 3
Explanation:
3 Nucleotides make up a Codon.
The nucleotide triplet that encodes an amino acid is called a codon.
Each group of three nucleotides encodes one amino acid.
- 3. At what temperature do pathogenic bacteria grow best in food?
Options- A. 5 to 15 degrees Celsius
- B. 15 to 25 degrees Celsius
- C. 20 to 45 degrees Celsius
- D. 40 to 65 degrees Celsius Also asked in: Bank Exams, AIEEE, Bank Clerk, Analyst
Correct Answer: 20 to 45 degrees Celsius
Explanation:
The Bacteria that causes Food Borne illness are called Food Borne Pathogens. Most of the pathogens are mesophilic in nature, optimum temperature may be around 20-45 degree celsius. This range of temperatures is often called the "Danger Zone." Dry foods do not support the growth of bacteria.
In order to kill pathogenic bacteria you need temperatures above 74ºC. Temperature is the easiest factor to control in order to prevent bacterial growth.
- 4. What are the three parts of the Nucleotide? Also asked in: Analyst, Bank Clerk
Correct Answer: Nucleotides are the building blocks of the DNA and RNA used as genetic material Nucleotides also are used for cell signaling and to transport energy throughout cells Both deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are made up of nucleotides which consist of three parts:: 1 Nitrogenous Base 2 Pentose Sugar 3 Phosphate Group
- 5. Nucleoli are present during
Options- A. prophase
- B. anaphase
- C. interphase
- D. prometaphase Also asked in: AIEEE, Analyst
Correct Answer: interphase
Explanation:
Nucleoli are present during Interphase.
Chromosomes become visible during Prophase.
Centromeres divide and sister chromatids become full-fledged chromosomes during Anaphase.
Spindle fibers attach to kinetochores during Prometaphase.
- 6. Nitrogen Fixation is carried out primarily by
Options- A. Plants
- B. Humans
- C. Consumers
- D. Bacteria Also asked in: AIEEE, Bank Exams, Analyst, Bank PO
Correct Answer: Bacteria
Explanation:
The process by which bacteria convert nitrogen gas (N2) into ammonia (NH3) is called Nitrogen Fixation.
The conversion of nitrogen from one form to another in the nitrogen cycle is carried out primarily by Nitrogen Fixing Bacteria such as Azotobacter.
- 7. What is the shortest phase of the cell cycle?
Options- A. M
- B. G1
- C. S
- D. G2 Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO, Database Administrator, IT Trainer
Correct Answer: M
Explanation:
Longest and shortest phases Of cell cycle:
Shortest Phase - M phase or Mitotic phase.
Longest phase - G1 phase of the Interphase
Longest and shortest phases During Mitosis:
Longest Phase - Prophase
Shortest Phase - Anaphase
- 8. Oxygen in our blood is transported by a protein named
Options- A. keratin
- B. myoglobi
- C. collagen
- D. haemoglobin Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: haemoglobin
Explanation:
Oxygen in our blood is transported by a protein named Haemoglobin.
- 9. One reason the skeletal system is important is because
Options- A. the skeletal system creates the connective tissue and tendons that allow the body to move
- B. the skeletal system is responsible for controlling functions of the entire body
- C. without the skeletal system, an individual would not have enough calcium to live
- D. the skeletal system is solely responsible for housing the body's immune system Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: the skeletal system creates the connective tissue and tendons that allow the body to move
Explanation:
One reason the skeletal system is important is because the skeletal system creates the connective tissue and tendons that allow the body to move.
- 10. The process of bones increasing in width is known as
Options- A. appositional growth
- B. closing of the epiphyseal plate
- C. concentric growth
- D. long bones reaching adult length and width Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
Correct Answer: appositional growth
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