Question 1

The technique of DNA fingerprinting in human was developed for first time by _________

Accepted Answer

Alec Jeffreys

Question 2

What do genes code for?

Accepted Answer

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.

Question 3

Which feature do Prokaryotic and Eukaryotic cells share

Accepted Answer

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.

Question 4

You can See, Smell and Taste microorganisms.

Accepted Answer

You cannot see a microorganisms without using a Microscope. You also cannot taste or smell microorganisms such as bacteria in contaminated food.

Question 5

Foods that allow micro organisms to grow are called Parasites.

Accepted Answer

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.

Question 6

A Sarcomere is the distance between two

Accepted Answer

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.

Question 7

How many daughter cells are produced in mitosis?

Accepted Answer

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.

Question 8

What prevents food from entering the windpipe?

Accepted Answer

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.

Question 9

Which of the following is not an enzyme?

Accepted Answer

Oxytocin is a mamallian hormone and also acts as neuro transmitter in the brain.

Question 10

How many amino acids are found in living organisms?

Accepted Answer

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.

Question 11

What base is found on RNA but not on DNA?

Accepted Answer

Uracil is present in RNA and binds to adenine whereas thymine is present in DNA and binds to adenine.

Question 12

Genes contain instructions for assembling what?

Accepted Answer

Genes which are segment of DNA of a cell contains instructions for assembling proteins.

Question 13

The DASH Diet plan was devised to prevent

Accepted Answer

he DASH Diet plan was devised to prevent high blood pressure i.e, hypertension.

Question 14

Which process requires cellular energy?

Accepted Answer

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: The Sodium-Potassium pump, Exocytosis, and Endocytosis.

Question 15

Goosebumps are caused by contractions of the

Accepted Answer

Muscles

Question 16

Which parts of the heart receive blood from the lungs?

Accepted Answer

Left Atrium

Question 17

Both food and air travel through the

Accepted Answer

pharynx

Question 18

A tetrad is made up of

Accepted Answer

two homologous chromosomes, each consisting of two chromatids

Question 19

What is plant cell wall mainly composed of?

Accepted Answer

Lipids

Question 20

A pair of contrasting characters controlling the same trait is called

Accepted Answer

allele

Biology Questions