Question 1

Organisms which synthesise their own food are called

Accepted Answer

Autotroph: This term means organisms that synthesise their own food. Troph means feeding. Auto means self. The green plants which synthesise their own food are called autotrophs. All others which depend upon the plants directly or indirectly are called heterotrophs.

Question 2

The grouping of blood is based on substances called

Accepted Answer

The red blood corpuscles or erythrocytes usually carry antigens and there are two types of antigens. The A group persons have antigen A in their red corpuscles and the B group have antigen B in their red corpuscles. The AB group person have both antigen A and antigen B in their erythrocytes. The 'O' group persons have no antigens in their red corpuscles.

Question 3

Organisms that live in the deep sea are mainly

Accepted Answer

Deep sea animals cannot produce food as there is no light. They have to depend upon the fall out of organic debirs raining down on them from surface layers. Hence they are detritivores.

Question 4

Genes are made of

Accepted Answer

Genes : The DNA is the genetic material. The DNA is made of several nucleotides. A nucleotide means, one nitrogenous base one sugar molecule and a phosphate molecule. These nucleotides occur in sequences and several nucleotides form one Gene ( a functional mgene is called a cistron)

Question 5

The book Historia plantrum is written by

Accepted Answer

Theophrastus

Question 6

The insects do not have blood pigments because

Accepted Answer

The blood of some invertebrate animals like the earthworm is red due to haemoglobin pigment, but the pigment is dissolved in the plasma. In vertebrates the same pigment is found in the red corpuscles and not in the plasma.

Question 7

In photosynthesis________

Accepted Answer

Light energy is converted into chemical energy

Question 8

Smallest bone of human body is _________

Accepted Answer

Stapes

Question 9

A true species in mauritius failed to reproduce because of the extinction of a fruit eating bird. Which one of the following was that bird?

Accepted Answer

Dodo

Question 10

Pollination is best defined as

Accepted Answer

Pollination is when pollen grains from an anther, the male portion of a flower, are transferred to a female part of the flower, known as the stigma. In order for pollination to be successful, the pollen grains transferred must be from a flower of the same species. After the pollen grains land on the stigma, they create a pollen tube through the length of the style or stalk connecting the stigma and ovary. Once the pollen tube is complete, the pollen grain will send sperm cells from the grain down to the ovary. When the sperm cells reach the ovary and the egg cells, fertilization will occur, which will result in the formation of the seed. The seed will then be released from the parent plant and will be able to grow into a plant and continue the reproductive cycle using the method of pollination.

Question 11

Which of these is Not a Carcinogen?

Accepted Answer

Asbestos can cause Lungs Gastrointestinal tract types of Cancer. Benzene can cause Leukemia Hodgkin's lymphoma types of Cancer. Cadmium can cause Prostate type of Cancer.

Question 12

Which of the following is not a function of proteins?

Accepted Answer

Protiens can help fight specific diseases, always there to regulate cell processes and build muscle/tissues. Structural proteins also known as Fibrous proteins, are necessary components of your body. They include collagen, keratin and elastin. Collagen forms the connective framework of your muscles, bones, tendons, skin and cartilage. Keratin is the main structural component in hair, nails, teeth and skin. Nucleic acids store and transmit heredity.

Question 13

Translation of the dna sequence AAGCTGGGA would result in

Accepted Answer

a DNA strand with the base sequence TTCGACCCT

Question 14

Which letter indicates systolic pressure?

Accepted Answer

a - at the peak of changes in blood pressure indicates the systiolic pressure.

Question 15

Angioplasty is the most typical treatment for arteriosclerosis.

Accepted Answer

Angioplasty, also known as balloon angioplasty or PTA, is a minimally invasive, endovascular procedure to widen narrowed or obstructed arteries or veins, typically to treat arterial atherosclerosis. Hence, the given statement that Angioplasty is the most typical treatment for arteriosclerosis is FALSE.

Question 16

The organs protected by the thoracic cage include the

Accepted Answer

both a & b

Question 17

Where does protein synthesis take place in a cell?

Accepted Answer

Ribosomes

Question 18

Oxygenated blood flows through which vessel?

Accepted Answer

The oxygenated blood flows through pulmonary veins then leaves the lungs, which return it to the left heart, completing the pulmonary cycle.

Question 19

The vitamin required for coagulation of blood

Accepted Answer

k

Question 20

Vitamin present in guava fruits

Accepted Answer

Vitamin - C

Biology Questions