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- Question
A Sarcomere is the distance between two
Options- A. Z discs
- B. H zones
- C. A bands
- D. I bands
- Correct Answer
- Z discs
ExplanationA 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.
- 1. Foods that allow micro organisms to grow are called Parasites.
Options- A. TRUE
- B. FALSE Discuss
- 2. You can See, Smell and Taste microorganisms.
Options- A. TRUE
- B. FALSE Discuss
- 3. Which feature do Prokaryotic and Eukaryotic cells share
Options- A. Nucleus
- B. DNA
- C. Nuclear membrane
- D. Membrane bound Organelles Discuss
- 4. What do genes code for?
Options- A. Ptoteins
- B. DNA
- C. RNA
- D. None Discuss
- 5. The technique of DNA fingerprinting in human was developed for first time by _________
Options- A. Lalji Singh
- B. Alec Jeffreys
- C. R. Ericson
- D. J. Black Discuss
- 6. How many daughter cells are produced in mitosis?
Options- A. 2
- B. 4
- C. 8
- D. None Discuss
- 7. What prevents food from entering the windpipe?
Options- A. Epiglottis
- B. Pharynx
- C. Trachea
- D. Larynx Discuss
- 8. Which of the following is not an enzyme?
Options- A. Oxytocin
- B. Trypsin
- C. Pepsin
- D. Ptyalin Discuss
- 9. How many amino acids are found in living organisms?
Options- A. 1500
- B. 3000
- C. 20
- D. 4 Discuss
- 10. What base is found on RNA but not on DNA?
Options- A. Uracil
- B. Thymine
- C. Adenine
- D. None of the above Discuss
Biology problems
Search Results
Correct Answer: FALSE
Explanation:
No, the given statement is False.
Parasites are organisms that feed on other organisms causing harm to them.
Foods that allow micro organisms to grow are called Growth Mediums.
Correct Answer: FALSE
Explanation:
You cannot see a microorganisms without using a Microscope. You also cannot taste or smell microorganisms such as bacteria in contaminated food.
Correct Answer: DNA
Explanation:
Prokaryotic and Eukaryotic cells do share a feature of DNA.
Both prokaryotic and eukaryotic cells have structures in common.
All cells have a plasma membrane, ribosomes, cytoplasm, and DNA.
Prokaryotic cells are primitive cells which have no true nucleus and membrane bound organelles, while Eukaryotic cells are cells that have true nucleus, membrane bound organelles and well defined structures and layouts.
Correct Answer: Ptoteins
Explanation:
The genome of an organism is inscribed in DNA, or in some viruses RNA. The portion of the genome that codes for a protein or an RNA is referred to as a gene. Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid.
Correct Answer: Alec Jeffreys
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: 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: Oxytocin
Explanation:
Oxytocin is a mamallian hormone and also acts as neuro transmitter in the brain.
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: Uracil
Explanation:
Uracil is present in RNA and binds to adenine whereas thymine is present in DNA and binds to adenine.
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