Question 1

Cortisol is secreted by

Accepted Answer

Adrenal gland

Question 2

The rate of respiration per minute in a new born baby

Accepted Answer

32 times

Question 3

Lamarck's theory of inheritance of acquired characters was challenged by

Accepted Answer

August Weismann cut off the tails of mice for 21 successive generations and still they produced generation after generation of only tailed young ones. So he concluded that acquired characters are not inherited.

Question 4

Cretinism is due to the disorder of the glands

Accepted Answer

Cretinism is a disease caused by hypothyroidism(less thyroxine formation).The symptoms of the disease are retardation of mental, physical and sexual developments. Potbellt, protruding tongue, dry skin etc are also indicative of this disease.

Question 5

Mycolog is the branch of botany in which we study about

Accepted Answer

Fungi

Question 6

Five Kingdom Classification was preposed by _________

Accepted Answer

whittaker

Question 7

Flowers in which polllination takes place by insect their pollen grains are ________

Accepted Answer

Rough and sticky

Question 8

Branch of science which deal with the study of causative agent of disease is __________

Accepted Answer

Etiology

Question 9

Genes are situated on _________

Accepted Answer

Chromosome

Question 10

Human Heart is made up of

Accepted Answer

cardiac muscle

Question 11

What provides electrons for the light reactions?

Accepted Answer

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.

Question 12

How many Nucleotides make up a Codon?

Accepted Answer

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.

Question 13

At what temperature do pathogenic bacteria grow best in food?

Accepted Answer

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.

Question 14

What are the three parts of the Nucleotide?

Accepted 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

Question 15

Nucleoli are present during

Accepted Answer

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.

Question 16

Nitrogen Fixation is carried out primarily by

Accepted Answer

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.

Question 17

What is the shortest phase of the cell cycle?

Accepted Answer

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

Question 18

Oxygen in our blood is transported by a protein named

Accepted Answer

Oxygen in our blood is transported by a protein named Haemoglobin.

Question 19

One reason the skeletal system is important is because

Accepted Answer

One reason the skeletal system is important is because the skeletal system creates the connective tissue and tendons that allow the body to move.

Question 20

The process of bones increasing in width is known as

Accepted Answer

appositional growth

Biology Questions