Mdcat-past-papers - BUMHS - Biology Quiz

121. The evolution of birds has long been a difficult issue for biologists until the discovery of Archaeopteryx fossil in 1861. This ancient bird exhibited teeth, a long tail containing 20 vertebrae and wings with movable finger and claws. In the light of mentioned facts who were the ancestors of the birds?

Insects
Pisces
Amphibians
Reptiles

122. The Archaeopteryx is a fossil bird which processes the characters of both

Fishes and Amphibians
Amphibians & Reptiles
Reptiles and Birds
Birds and mammals

123. Chlorophyll molecule contains:

Mg
Ca
K
Na

124. Carotenoids absorb light of:

Yellow-orange range
Blue-violet range
Orange-red range
Green range

125. Autotrophic mode in nutrition in organisms depends upon?

Saprotrophic mode
Parasitic mode
Photosynthetic mode
Obligate mode

126. Which option is correct about a chlorophyll molecule?

Chemical formula C55H72O5N4Mg
Methyl group on second pyrrole ring
Porphyrin ring with nitrogen in centre
Aldehyde group on second pyrrole ring

127. Anaerobic respiration as compared to aerobic respiration produces:

Less ATPs
More ATPs
Equal ATPs
Does not produce ATP

128. Ubiquinone contains:

Iron chloride
Iron sulphate
Iron
Iron phosphate

129. Chlorophyll and accessory pigment absorb light and transfer the energy that initiates the light reactions. What is the order of energy transfer:

Carotenoids - Chlorophyll b - Chlorophyll a
Chlorophyll II a - carotenoids - chlorophyll II b - chlorophyll I
Chlorophyll a - chlorophyll b - carotenoids - chlorophyll a
Carotenoids - chlorophyll a - chlorophyll b - chlorophyll a

130. The carotenoids absorb light in the visible spectrum between -------- and -------- wavelengths.

400-600nm
630-700nm
620-700nm
500-600nm

131. Cyclic phosphorylation uses:

PSI
PSII
uses both photosystems
uses none of the above

132. #NAME?

Thylakoid membrane
Thylakoid space
Stroma
Grana

133. Which of following photo-system is involved in cyclic photophosphorylation?

PS-I and PS-II
PS-II
PS-III
PS-I

134. In the journey of electrons from photosystem II to photosystem I plastocyanin is reduced by:

Plastoquinone
Cytochrome complex
P700
Primary electron acceptor of PS-I

135. ATP is best defined as:

ATP
The molecule that has no role in muscle contraction
The molecule that releases energy when phosphate molecule is added
The molecule that is only present inside the nucleus

136. During the light-dependent phase of photosynthesis, the water molecule is broken down into:

2H2e and 1/2O2
2H, 2e and 2O
4H, 4e and 2O
4H, 2e and 4O

137. Photophosphorylation takes place in the of chloroplast:

Stroma
Granum
Inner membrane
Outer membrane

138. Oxygen released during photosynthesis comes from:

CO2
SO2
H2O
Glucose

139. What are the products of light-dependent reactions of photosynthesis?

ATP, RuBP, and reduced NAD
GP, Oxygen, and reduced NAD
ATP, Oxygen, and reduced NADP
GP, reduced NADP, and RuBP

140. Which of the following is the stage of cellular respiration for which oxygen is not essential:

Glycolysis
Pyruvate oxidation
Krebs cycle
Electron transport chain