Biology problems
- 1. Which statement regarding the mammalian heart is correct?
Options- A. Blood is pumped from the heart via the atria.
- B. Oxygen-loaded blood moves only through the right side of the heart.
- C. When the right atrium contracts, it forces blood into the left atrium.
- D. In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs. Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs.
Explanation:
In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs is correct regarding mammalian heart.
- 2. ATP is a compound that is synthesized when
Options- A. digestive enzymes break amino acids into smaller pieces
- B. energy stored in nitrogen is released froming amino acids
- C. energy is stored in chemical bonds is released during cellular respiration
- D. chemical bonds between carbon atoms are formed by during photo synthesis Also asked in: AIEEE, Analyst
Correct Answer: energy is stored in chemical bonds is released during cellular respiration
- 3. The outer membrane that covers the lungs
Options- A. Dura mater
- B. pleura
- C. Pia mater
- D. Myelin sheath Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: pleura
Explanation:
The pleura is the membrane that covers the lungs, according to InnerBody. The pleura consists of two layers, with the parietal pleura forming the membrane's outer layer and the visceral pleura forming the membrane's inner layer.
- 4. Which of the following is part of the axial skeleton?
Options- A. Thigh bone
- B. Shoulder bones
- C. Vertebral column
- D. Foot bones Also asked in: GATE, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst
Correct Answer: Vertebral column
Explanation:
The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate. In the human skeleton, it consists of 80 bones and is composed of six parts; the skull bones, the ossicles of the middle ear, the hyoid bone, the rib cage, sternum and the vertebral column.
Bones of shoulder, thigh and foot are the part of appendicular skeleton.
Hence, Vertebral column is the part of axial skeleton.
- 5. A myocardial infarction is a heart attack.
Options- A. TRUE
- B. FALSE Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: TRUE
- 6. What is the function of reverse transcriptase?
Options- A. synthesis of RNA from protein
- B. synthesis of DNA from an RNA template
- C. synthesis of protein from DNA
- D. synthesis of DNA from protein Also asked in: AIEEE, Bank Exams, Analyst, Bank PO
Correct Answer: synthesis of DNA from an RNA template
Explanation:
A reverse transcriptase (RT) is an enzyme used to generate complementary DNA (cDNA) from an RNA template by a process called Reverse Transcription.
In brief its function is that copies all or part of the virus RNA (retroviruses are RNA-only) as DNA which can then be integrated into the DNA of the host organism.
- 7. In what organelle does cellular respiration take place?
Options- A. Cytoplasm
- B. Ribosomes
- C. Mitochondria
- D. None of the above Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: Mitochondria
Explanation:
Cellular respiration is the multi-step process that creates energy from nutrients and food molecules. It begins in the cytoplasm of the cell, with the mitochondria functioning as the main organelle where the rest of the process continues and finishes.
During respiration, glycolysis occurs in the cytoplasm of the cell.
- 8. Nucleotides are made of a pentose only.
Options- A. TRUE
- B. FALSE Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
Correct Answer: FALSE
Explanation:
DNA is made of nucleotides. And these Nucleotides are made of a pentose sugar deoxyribose, a phosphate, and a nitrogen-containing bases.
Hence, the given statement 'Nucleotides are made of a pentose only' is FALSE.
- 9. What process immediately preceeded protein synthesis at the ribosome?
Options- A. transcription
- B. replication
- C. translation
- D. duplication Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
Correct Answer: transcription
Explanation:
Protein synthesis at the ribosome is immediately preceeded by the transcription process.
- 10. The sciatic nerve is a combination of which two nerves?
Options- A. common fibular and tibial
- B. pudendal and posterior femoral cutaneous
- C. posterior femoral cutaneous and tibial
- D. pudendal and common fibular Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: common fibular and tibial
Explanation:
The sciatic nerve is a combination of common fibular and tibial.
The sciatic nerve divides into its two branches::
1. The tibial nerve
2. The common fibular nerve
at the popliteal fossa.
The tibial nerve, which travels down the posterior compartment of the leg into the foot.
The common peroneal nerve also called the common fibular nerve, which travels down the anterior and lateral compartments of the leg into the foot.
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