Question

Q 1-Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process? 2 points (A) alcohol and lactic acid (B)alcohol and CO2 (C) lactic acid and CO2 (D) lactic acid only Clear selection Q2- Yeast is used in wine and beer industries because it respires. 2 points (A)aerobically producing oxygen (B) aerobically producing alcohol anaerobically producing alcohol anaerobically producing CO2 Clear selection Q3- During the process of exhalation, the ribs move 2 points (A) down and inwards (B)up and inwards (C)down and outwards up and outward Q4-Which are the gases involved in breathing? 2 points (A) O2 and NO2 (B)O2 and SO2 O2 and O3 O2 and CO2 Q5- Name the organ of the body in which the blood is oxygenated. 2 points (A)Heart (B) Lungs (C) Lever (D) Pancreas Q6- Which of the following is the main circulatory fluid in our body ? 2 points (A)Plasma (B) Lymph (C) Blood (D) None of these Q 7- Which one of the following contains haemoglobin? 2 points (A) RBC (B) WBC (C) Platelets (D) None of these Q 8- What is the function of WBCs? 2 points (A) Transport of oxygen (B) Fight against germs (C) Both (a) and (B) All of these Q 9- Blood platelets help in 2 points (A)formation of urine (B) excretion of urine (C) sweating (D) blood clotting Q 10-The muscular tube through which stored urine is passed out of the body is called: * 2 points (A) kidney (B) ureter (C) urethra (D)urinary bladder Q 11-Aquatic animals like fish excrete their wastes in gaseous form as 2 points (A) Oxygen (B) Hydrogen (C) Ammonia (D) Nitrogen Q 12-Vegetative propagation in potato takes place by 2 points (A) leaves (B) stem (C) root (D) seed Q 13- In which of the following plants buds are present on the margins of leaves? 2 points (A) Bryophyllum (B) Touch me not (C)Chandan (D) Coriander Q14 - In yeasts reproduction occurs by 2 points (A) fragmentation (B) binary fission budding (D)spore formation Q 15- Lila observed that a pond with clear water was covered up with a green algae within a week. By which method of reproduction did the algae spread so rapidly ? 2 points (A) Budding (B) Sexual reproduction (C) Fragmentation (D) Pollination​

Answer 1

Q-1- (A) Alcohol and lactic acid

Q-3 (A)

Q-5 (B) lungs

Q-6 (C) blood

Q-7 (A) RBC(Red Blood cells)

Q-8 (B) fight against germs

Q-9 (D) Blood clotting

Q-10 (B) urinary bladder

Q-12 (C) roots

Q-13 (A) Byrophyllum

Q-14 (B) budding

Q-15 (A) budding