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- Question
What base is found on RNA but not on DNA?
Options- A. Uracil
- B. Thymine
- C. Adenine
- D. None of the above
- Correct Answer
- Uracil
ExplanationUracil is present in RNA and binds to adenine whereas thymine is present in DNA and binds to adenine.
- 1. How many amino acids are found in living organisms?
Options- A. 1500
- B. 3000
- C. 20
- D. 4 Discuss
- 2. Which of the following is not an enzyme?
Options- A. Oxytocin
- B. Trypsin
- C. Pepsin
- D. Ptyalin Discuss
- 3. What prevents food from entering the windpipe?
Options- A. Epiglottis
- B. Pharynx
- C. Trachea
- D. Larynx Discuss
- 4. How many daughter cells are produced in mitosis?
Options- A. 2
- B. 4
- C. 8
- D. None Discuss
- 5. A Sarcomere is the distance between two
Options- A. Z discs
- B. H zones
- C. A bands
- D. I bands Discuss
- 6. Genes contain instructions for assembling what?
Options- A. Amino acids
- B. Proteins
- C. Nucleotides
- D. All of the above Discuss
- 7. The DASH Diet plan was devised to prevent
Options- A. TB
- B. Thyroid
- C. Hypertension
- D. Diabetes Discuss
- 8. Which process requires cellular energy?
Options- A. Passive transport
- B. Active transport
- C. Both A & B
- D. None of the above Discuss
- The Sodium-Potassium pump,
- Exocytosis, and
- Endocytosis.
- 9. Goosebumps are caused by contractions of the
Options- A. Muscles
- B. Nerves
- C. Bones
- D. All of the above Discuss
- 10. Which parts of the heart receive blood from the lungs?
Options- A. Right ventricle
- B. Left Atrium
- C. Left Ventricle
- D. Right ATrium Discuss
Biology problems
Search Results
Correct Answer: 20
Explanation:
Amino acids are a crucial, yet basic unit of protein, and they contain an amino group and a carboxylic group. They play an extensive role in gene expression processes.
Amino acids become proteins when 50 or more are bonded together in a chain. All the millions of different proteins in living things are formed by the bonding of only 20 amino acids.
Eight of these amino acids are essential and cannot be produced by the body.
They are:
? Leucine
? Isoleucine
? Lysine
? Threonine
? Methionine
? Phenylalanine
? Valine
? Tryptophan
? Histidine is an amino acid that is categorized as semi-essential since the human body doesn't always need it to properly function
Nonessential amino acids are produced by the human body either from essential amino acids or from normal protein breakdowns. Nonessential amino acids include:
? Asparagine
? Alanine
? Arginine
? Aspartic acid
? Cysteine
? Glutamic acid
? Glutamine
? Proline
? Glycine
? Tyrosine
? Serine.
Correct Answer: Oxytocin
Explanation:
Oxytocin is a mamallian hormone and also acts as neuro transmitter in the brain.
Correct Answer: Epiglottis
Explanation:
Epiglottis is that prevents food from entering the windpipe.
It is a cartilageous flap that flaps opens and closes when swallowing. When you swallow, the epiglottis flattens backward to cover the entrance to your larynx and prevent food from entering the lungs and windpipe. The epiglottis returns to its usual position after swallowing.
Correct Answer: 2
Explanation:
In Mitosis, one parent cell divides into 2 daughter cells with identical chromosomal number. However, in Meiosis, one diploid parent cell divides into 4 haploid daughter cells.
Correct Answer: Z discs
Explanation:
A sarcomere is the basic unit of striated muscle tissue. It is the repeating unit between two Z lines.
Skeletal muscles are composed of tubular muscle cells (myocytes called muscle fibers or myofibers) which are formed in a process known as myogenesis. Muscle fibers contain numerous tubular myofibrils. Myofibrils are composed of repeating sections of sarcomeres, which appear under the microscope as alternating dark and light bands. Sarcomeres are composed of long, fibrous proteins as filaments that slide past each other when a muscle contracts or relaxes.
A muscle fiber from a biceps muscle may contain 100,000 sarcomeres.
Correct Answer: Proteins
Explanation:
Genes which are segment of DNA of a cell contains instructions for assembling proteins.
Correct Answer: Hypertension
Explanation:
he DASH Diet plan was devised to prevent high blood pressure i.e, hypertension.
Correct Answer: Active transport
Explanation:
Active transport is a method of transport of ions or molecules along the cell membrane in the cell from lower to higher concentration region and which needs cellular energy.
There are three main types of Active Transport. They are:
Correct Answer: Muscles
Correct Answer: Left Atrium
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