The control and regulation of biological processes involve some enzymes. They are known as
Anonymous Quiz
16%
(a) inhibitors
41%
(b) regulators
35%
(c) allosteric enzymes
7%
(d) activators
What are the non-substrate molecules binding to the allosteric sites called?
Anonymous Quiz
28%
(a) allosteric substrate
14%
(b) reactants
36%
(c) allosteric modulators
21%
(d) inhibitors
Allosteric enzymes consist of several
Anonymous Quiz
21%
(a) polypeptide chains
32%
(b) inhibitors
15%
(c) temperature ranges
32%
(d) active sites
Enzymes that are involved in the feedback inhibition are known as
Anonymous Quiz
14%
(a) Apoenzymes
23%
(b) Holoenzymes
47%
(c) Allosteric enzymes
16%
(d) Coenzymes
Blocking of enzyme action by blocking its active sites is
Anonymous Quiz
9%
(a) feedback inhibition
37%
(b) allosteric inhibition
49%
(c) competitive inhibition
5%
(d) non-competitive inhibition
The “Lock and key” theory of enzyme action was put forward by
Anonymous Quiz
22%
(a) Koshland
39%
(b) Fischer
23%
(c) Kuhne
17%
(d) Arrhenius
The fastest enzyme is
Anonymous Quiz
32%
(a) carbonic anhydrase
23%
(b) pepsin
40%
(c) DNA polymerase
5%
(d) DNA gyrase
The allosteric enzymes on the top of active sites contain
Anonymous Quiz
18%
(a) substrate
30%
(b) inhibitors
26%
(c) polypeptide chains
26%
(d) allosteric site
In corolla length of Nicotiana longiflora, polygenic inheritance was studied by
Anonymous Quiz
17%
(a) Joseph Kolreuter
30%
(b) E.M. East
39%
(c) Francis Galton
14%
(d) Nilsson-Ehle
Marriages between close relatives should be avoided as it causes more
Anonymous Quiz
30%
(a) Abnormalities in child birth
18%
(b) Mutations
47%
(c) Recessive alleles to come together
5%
(d) Multiple births
When two or more nonallelic gene pairs affect the same character in the same way, it is called
Anonymous Quiz
29%
(a) pleiotropy
49%
(b) polygenic inheritance
19%
(c) additive expressivity
3%
(d) total penetrance
Polygenes exhibit
Anonymous Quiz
12%
(a) Different phenotypes
20%
(b) Different genotypes
28%
(c) Similar genotypes and phenotypes
39%
(d) Both (a) and (b)
Traits which exhibit continuous phenotypic variation are typically determined by this inheritance form
Anonymous Quiz
19%
(a) incomplete dominance
35%
(b) polygene inheritance
30%
(c) multiple-allele inheritance
17%
(d) sex-linked inheritance
One of the X chromosomes in females is inactivated by
Anonymous Quiz
9%
(a) environmental factors
19%
(b) enzymes coded for by mitochondrial DNA
58%
(c) number of dominant genes found on each X chromosome
13%
(d) epigenetic markers
Pick the correct statement
Anonymous Quiz
16%
(a) Pleiotropic genes exhibit single phenotype
52%
(b) Pleiotropy is caused by a gene that has multiple phenotypic effect
21%
(c) Lethal genes causes the appearance of ancestral characters
11%
(d) Sickle cell anemia is an example of multifactorial inheritance
9. Which of these illustrates pleiotropy?
Anonymous Quiz
10%
(a) Matings between earless sheep and long eared sheep always result in short eared offspring
37%
(b) Human cystic fibrosis causes many symptoms from respiratory distress to digestive problems
34%
(c) Wheat kerneis can range from white to red in color, a trait governed by multiple genes
18%
(d) The genes for scarlet eyes and hairy body in fruit flies are located on the same chromosome
Morphan’s syndrome is as a result of
Anonymous Quiz
25%
(a) Polygene
26%
(b) Pseudogene
27%
(c) Modifier gene
22%
(d) Pleiotropic gene